
Satellite Exploration of Thailand > Project > Western Frontier
Beyond Umphang
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Background (switch): Landsat vs. SRTM |
For many travelers going down the Death Highway, the township of Umphang constitutes their cognitive horizon beyond which their further itinerary - typically a visit to the Thee Lor Su waterfall - is organized by tour operators. For a handful of explorers, however, the road further extends to the south (R 1090 continued), west (R 1167) and southwest (R 1288).
For the sake of convenience, the author divides this region into following areas:
Area 1. East of Umphang
Area 2. Mae Klong River
Area 3. Huai Klo Tho and the Thee Lor Su Waterfall
Area 4. R 1090 (continued)
Area 5. R 1167 (to Ban Nong Luang)
Area 6. R 1288 (to Ban Boeng Kloeng)
Area 7. Ban Mong Khwa and Ban Le Tong Khu
Area 8. Ban Thi Pho Chi and vicinity
Area 9. Northwestern Recess
Area 1. East of Umphang
Several villages sit along the mountainside in the east of Umphang. For anthropologically-minded explorers, these villages should prove to be no less fascinating than more adventurous villages along the Burmese border.
Northeast: Huai Ya Mae and Ban Ya Mae Khi
My sources indicate that Ban Ya Mae Khi is situated closer to the Mae Klong River than the same named stream. In any case, the distance between the Mae Klong River and Huai Ya Mae here is about 1.2km over a low hill, and there is a connecting track.
Huai Ya Mae reaches the watershed divide between the Mae Klong River and Ping River, and Ban Ya Mae Khi historically served as the starting/finishing point for the trail along Huai Ya Mae, which connected the two river basins.
East: Huai Ya Mo and Ban Ya Mo Khi
A straightforward (dirt?) road starts just beside the Umphang airstrip. Again, there is an uncertainty as to its exact location. If I am correct in interpreting my sources, a small patch of about 500m x 2.7km is excluded from the Umphang Wildlife Sanctuary for the use by Ban Ya Mo Khi villagers.
Southeast: Huai Umphang and Ban Umphang Khi
Ban Umphang Khi wouldn't have been listed on the tourist map if not for the popular rafting activity down the Huai Umphang River. Non-rafting explorers will still find Ban Umphang Khi a curious destination. Reportedly, an all-season (dirt?) road extends as far as Ban Pae Do Tha, beyond which lies a dry-season-only 4WD track.
Following the Huai Umphang upstream till its headwaters near Chong Yen, thence down R 1117 to the lowlands of Kamphaent Phet Province is theoretically possible for hard-core trekkers, but difficult in practice. (See the R 1117 section of my former compilation Death Highway.)
Elevation Chart: Huai Umphang
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Ban Umphang Khi

SRTM + Landsat (30% overlay) |
Reference
Ban Umphang Khi
http://www.umphanghill.com/upk14july03/index.htm
http://www.pop.co.th/travel/honey.phtml?sid=1939&type=en
http://www.flickr.com/photos/mrhuevo/77121056/
http://www.flickr.com/photos/mrhuevo/77121058/
http://www.flickr.com/photos/mrhuevo/83823525/ |
Area 2. Mae Klong River
The idea must have inspired the imagination of not a few explorers that the Mae Klong River connects Umphang and Kanchanaburi, running through the formidable Thungyai-Naresuan Wildlife Sanctuary. Christian Gooden remarks that "for a while, the Mae Klong had been used for floating logs south from Um Pang district to Kanchanaburi (Three Pagodas, p295)," but it is not apparent from which part of Umphang the logs were floated.
For strategic reasons, let us divide the Mae Klong route from Umphang to Kanchanaburi into following five sections:
| Section # | Length | From - To | Difficulty |
| Section 1 | 33 km | Umphang - Ban Palata | Regular route for tourist rafting |
| Section 2 | 23 + a km | Ban Palata - Thee Lor Lay Waterfall | Regular route for tourist rafting |
| Section 3 | 32 - a km | Thee Lor Lay Waterfall - Ban Mae Chanta | Most difficult and largely unaccounted for |
| Section 4 | 73 km | Ban Mae Chanta - Sri Nakharin Reservoir | Reportedly possible |
| Section 5 | 80 km | Through the Sri Nakharin Reservoir - Sri Nakharin Dam | No problem |
Elevation Chart: Mae Klong River (Headwaters - Umphang)

Elevation Chart: Mae Klong River (Umphang - Sri Nakharin Reservoir)

Note: These elevation charts were drawn on the SRTM data, thus subject to "false high" at narrow gorges. For further discussion on this issue, refer to my travelog Destination: Nan.
Section 1
Rafting down the Mae Klong River is a popular tourist activity. Typically, a rubber boat would start in Umphang, pass through a series of adventurous rapids and fantastic sceneries, and pull out at either Pha Luad (Blood Cliff) or Tha Sai to continue on land (either on foot or on a pickup) to the Thee Lor Su Waterfall. A handful would continue along the Mae Klong River, further enjoy rapids and sceneries along the way, and pull out at Ban Palata where a pickup would be in wait.
Umphang - start
Huai Umphang River joins Mae Klong River
Thee Lor Jor Waterfall
a riverside hot spring
Takobi Rapids
Honey Comb Cliff (Pha Pueng)
Bat Cave
Pha Luad (Blood Cliff) - landing to Thee Lor Su Waterfall, Forestry Station and river checkpoint
Pha Bong (Hole Cliff)
Tha Sai - landing to Thee Lor Su Waterfall
Mokedo Rapids
Mae La Mung River Confluence
Ban Palata - goal
A note about the Mae Lamung River which joins the Mae Klong River some 3km north of Ban Palata. Along its course are (were?) Ban Huai Phlu, Ban Mae Lamung and Ban Liso Pong (I think). Among these three villages, only Ban Huai Phlu is listed in the L 7017, meaning that other two villages are relatively recent settlements (possibly already relocated).
Section 2
The rafting excursion from Ban Palata to the Thee Lor Lay Waterfall can just as regularly be organized as the one starting from Umphang, but reportedly more rigorous - more difficult rapids and lengthy return trek (either on foot or on elephant). The Thee Lor Lay Waterfall marks the boundary of regular tourist excursion, beyond which the Mae Klong River is shrouded in rumors and hearsays.
Ban Palata - start
Confluence of Huai Klo Tho (stream from Thee Lor Su)
Lekati Rapids
small waterfall
Pha Khon Mong (or Khon Hmong?)
Khon Mong Rapids
Confluence of Huai Kachochita (or Ka Chao Chi Ta)
Kachochile Rapids
Thee Lor Lay Waterfall - goal
I haven't been able to find the exact location of the Thee Lor Lay Waterfall, nor could I locate it on satellite images. This is especially frustrating because, by all accounts, this waterfall must be captured on the Google Earth Quickbird image. Several accounts of rafting excursion to the Thee Lor Lay Waterfall are available on the web, but none are descriptive enough for spatial identification. Also, several pictures of the Thee Lor Lay Waterfall are available but, again, their angles are limited and not quite applicable to satellite image identification.
Following is a hypothetical location of the Thee Lor Lay Waterfall, deduced from rafting accounts and pictures.
| Google Earth Quickbird Images (color enhanced, km markers from Ban Palata) |

Eye alt. = 1.2 km |

Eye alt. = 500m |

Tilted (pseudo-3D) |
Sections 3 - 5
To be discussed in the next chapter.
Reference
Mae Klong River and Thee Lor Lay Waterfall
http://www.maxonetour.com/viewmk/index.htm
http://www.maxonetour.com/tll2.html
http://www.scruffydan.com/blog/?p=411
http://www.trekkingthai.com/cgi-bin/webboard/generate.pl?board=trip&content=0619 |
Area 3. Huai Klo Tho and the Thee Lor Su Waterfall
Huai Klo Tho originates in the border ridge in the north of Ban Klo Tho, runs along R 1288 for some 10km, changes its course southeastward and forms two waterfalls - the Thee Lor Su Waterfall and Ko Tha Waterfall - before joining the Mae Klong River 3.5km SW of Ban Palata.
The magnitude and popularity of the Thee Lor Su Waterfall completely overshadow the Ko Tha Waterfall but, among trekkers who spend a night in Ban Ko Tha, this second waterfall is generally well-praised.
Elevation Chart: Huai Klo Tho
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Thee Lor Su Waterfall

SRTM + Landsat (30% overlay) | |
Ko Tha Waterfall

SRTM + Landsat (30% overlay) |
| Aerial Pictures of the Thee Lor Su Waterfall |
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File name: picTomTeelorsuSmall.jpg
Date: 2003.08.12
Size: 576 x 943
Download: http://www.claytor.com/latestnews/ |
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File name: picTeelorsuAerialPhotoTomClaytor.jpg
Date: 2003.08.12
Size: 1860 x 1467
Download: http://www.thaiflyingclub.com/linkpicturestodownload.html |
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File name: picWilgaTeelorsu15.55'Nx098.45'E.jpg
Date: ?
Size: 1139 x 835
Download: http://www.thaiflyingclub.com/linkwilgateelorsu.html |
There is an established 25km-long 4WD track from R 1288 to the Thee Lor Su Wterfall campsite. I haven't been able to determine the exact course of this track. The route I added on the map is a tentative deduction. The entire route falls under the management of the Forestry Department, and subject to closure (for motor vehicles) during the rainy season.
A typical rafting and trekking excursion from Umphang disembarks at either Pha Luad or Tha Sai, and tourists trek the rest of the way which is often described as horrendous. During the dry season, the traffic is heavy with SUV's and pickups driving up from Umphang; during the wet season, the track is muddy - often knee deep.
Elevation Chart: Access road to the Thee Lor Su Waterfall
Reportedly, the 4WD track further continues southward and connects to Ban Ko Tha thence Ban Thi Pho Chi (probably restricted passage), but I cannot trace its route on the Landsat image.
Ban Ko Tha
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School in Ban Ko Tha

http://www.trekthailand.net/places/5/ |
This is an older settlement listed in the L 7017, connected with its neighbors (Ban Palata to the SE and Ban Thi Pho Chi to the SW) by foot paths. This village is now integrated in the Thee-Lor-Su-centered trek tours, and sees a fair number of tourists. Quote from a travelog:
About 2 hours later we arrived at the village. It is small, less than 150 people. But it has been around for 130 years! They live in bamboo raised huts with attap roofs. Pigs, chickens and dogs roam around, as well as children. They are farmers, growing mostly rice. Their only income is from selling chilies they grow, and from tourism... The older people (about 40 years old and up) do not even understand Thai. They are quite shy, and we were disappointed we could not interact with them, despite eating our meals in one family's home and sleeping in one of their huts...
http://wappers.blogspot.com/2005_03_01_wappers_archive.html
Reference
Thee Lor Su Waterfall
http://www.4x4-explorers.com/galleries/thilawsu/index1.htm
http://www.umphanghill.com/tls14july03/index.htm
http://www.talkabouttravelling.com/group/rec.travel.asia/messages/173530.html
http://www.ecologyasia.com/news-archives/2000/dec-00/bangkokpost_181200_Outlook03.htm
http://202.44.15.50/tis/News/4/44001162.htm |
Area 4. R 1090 (continued)
The second leg of R 1090 starts rather unassumingly at a small junction in the town of Umphang. According to the article Hmong Relocated in Northern Thailand (1988), this section of R 1090 was originally engineered by the army circa 1985 to speed up the evacuation plan of nine Hmong villages in the northeastern section of the Thungyai Naresuan Wildlife Sanctuary.
Elevation Chart: R 1090 (continued)
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Route description (compiled from Three Pagodas)
| km | 0: | Umphang |
| km | 3.3: | Way R to Thee Lor Jor Waterfall ( = Sai Fon Waterfall) |
| km | 10.1: | Way L to viewpoint (600m, Doi Hua Mot) |
| km | 22.0: | Bridge over Huai Mae Lamung |
| km | 22.6: | Way R - trail to Ban Ko Tha (12km) |
| km | 25.8: | Ban Palata |
| km | 29.8: | Way L to Sepla Waterfall |
| km | 30.3: | Ban Sepla |
| km | 45.3: | Guardhouse, checkpoint, barrier and formal northern entrance to Tung Yai Naresuan Wildlife Sanctuary and Forest Protection Zone. Beyond checkpoint: main HQ buildings set back L, and little shop set back R. |
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Quickbird Images
Ban Palata

Google Earth Quickbird (Eye alt. 1000m) |
Many villages in the Western Forest Complex have been forcibly relocated, but these two villages have been spared the fate. Indeed, an approximate 3km x 8km patch has been excluded from the Umphang Wildlife Sanctuary to allow these villages and their crop fields. Christian Gooden describes, "Pa La Ta is said to be the biggest Karen village in Um Pang district, to be about 250 years old, and to have about 30 elephants (value of each up to 150,000 baht) - more than any other local village."
These villages are no less vulnerable to the oncoming tide of tourism and commercialism. Ban Palata serves as a pull out point for rafts coming from Umphang and/or pull in point for rafts heading for the Thee Lor Lay Waterfall. Ban Sepla serves as a pick up point for trekkers back from the Thee Lor Lay Waterfall. |
Ban Sepla

Google Earth Quickbird (Eye alt. 1000m) |
Published maps often show at the end of R 1090 either "Ban Ka Ngae Khi" or "Ban Piya Cho." Neither of them appear on the L 7017 (meaning newer settlements) and, thus, vulnerable to forced relocation. Ban Ka Ngae Khi (Hmong) was located at the exact site of the present Sanctuary headquarters until around 1994 when it was relocated. Christian Gooden visited this village in early 1990s and describes it as "a thriving Hmong village." Then on his revisit in 2001, "completely gone, amazingly." Ban Piya Cho (Karen) is more sketchy. I have placed a tentative icon on the map. Probably long gone by now.
One can see on the Landsat image a vast tract of deforested patches (approx. 50km2 in total) around the present headquarters. In this area alone, probably, about a dozen villages have been relocated to ensure the integrity of the Western Forest Complex. The old patches - gradually overgrown with weeds and shrubs - are, in a sense, tombstones for the former communities, and a testimony to the sorrows of forcibly relocated villagers.
Note: I came to a dilemma in compiling the map, that this Wildlife Sanctuary headquarters seems to be situated just north of the Thungyai Naresuan Wildlife Sanctuary and inside the Umphang Wildlife Sanctuary. I adopted the protected areas boundary from a research paper Ecosystem-based Management Zones of the Western Forest Complex, Thailand, and its map seems to be reasonably accurate. Perhaps, the headquarters is indeed situated in the Umphang Wildlife Sanctuary and serves both sanctuaries?
End of the Road: To be continued?
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Probably, still at the time of writing, the km-45.3 headquarters practically marks the end of journey beyond which one's further pursuit is up to the mood of the guards at the checkpoint as well as your negotiating skills.
The MapMagic Thailand 2005 - fairly detailed and very accurate so far - needs to be critically reviewed beyond Umphang (See the image right). Conspicuously, whole of R 1167 and part of R 1288 are misdrawn - a blunder for the MapMagic Thailand - and R 1090 in the south of Umphang is extended beyond the Sanctuary headquarters. On this second point, the author deems it plausible that R 1090 beyond the headquarters has actually been planned and formally approved - partially following existing tracks - and the construction may start anytime soon if not already in motion.
This headquarters is the starting point for the (4WD) maintenance road network in the Thungyai-Naresuan Wildlife Sanctuary. I will discuss this issue in the next chapter.
Quote: One sanctuary opens to relieve tourist congestion in another / Bangkok Post - Feb 28, 2005
Forest authorities in Tak province plan to open the eastern part of the Thung Yai Naresuan wildlife sanctuary to relieve visitor congestion and protect the nearby Umphang wildlife sanctuary.
Voravit Chuesuwan, director of Forest Conservation Office 14 in Tak, said the number of visitors to the Thi Lo Su waterfall in the Umphang sanctuary was increasing every year, from a few thousand a decade ago, to 36,400 in 2003 and 61,499 last year.
In 2003 the National Park, Wildlife and Plant Conservation Department capped visitors at 500 at a time but later bowed to pressure from tour operators, relaxing that to 700 a time and then 1,500 a time.
The latest change was approved last November along with promises to improve services such as toilets, kitchens, tap water and rubbish disposal and wastewater systems.
The ceiling is not always enforced. During the New Year long holiday, Thi Lo Su received almost 2,000 visitors a day. Numbers peaked at 3,051 on Jan 1 this year, twice as much as the ceiling permits.
Conservationists say that situation cannot continue or nature in Umphang wildlife sanctuary will be permanently damaged. ``The impact we can see are physical ones only while damage to the ecological system will not show up immediately. It takes time for ecological damage to surface,'' Mr Voravit said.
Chatchawal Pisdamkham of the Umphang wildlife sanctuary said opening the eastern part of the Thung Yai Naresuan wildlife sanctuary would relieve visitor numbers in Umphang. He is confident the nearby sanctuary can attract visitors for its natural abundance of grass fields, swamps, and evergreen forests.
Preecha Chansiritanont, acting deputy director of the National Park, Wildlife and Plant Conservation Department, said opening the wildlife sanctuary could raise public awareness about environmental protection. No detail was given on when the sanctuary will open. |
Reference
Ban Palata
http://www.geocities.com/palata_holiday_camp/ |
Area 5. R 1167 (to Ban Nong Luang)
For the vast majority of tourists, R 1167 is merely a transit to/from the Thee Lor Su Waterfall - perhaps with a short side trip to the Takobi Cave. For explorers, however, the road itself arouses expectations and anxiety - anxiety of what one would encounter at the end of the road. Indeed, R 1167 - roughly corresponding to the lower section of the historical route to Umphang - connects the border frontier and Umphang in mere 21 kilometers.
Elevation Chart: R 1167
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Route description (compiled from Three Pagodas)
| km | 0: | R 1167 branches off from R 1090 (3.8km north of Umphang) |
| km | 3.3: | Way L to the Takobi Cave |
| km | 8.5: | R 1288 branches off (L) |
| km | 9.5: | Ban Soe Ta |
| km | 11.8: | Ban Nong Luang |
| km | 16.5: | Checkpoint and Thai army camp (up R) |
| km | 17.3: | End of road and border |
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Takobi Cave
Thailand's western frontier is dotted with caves - many of which are yet to be explored or discovered. Large caves are often exploited as a commercial resource to attract tourists. The Takobi Cave, for one, is often touted in tourist brochures as the fourth longest cave in Thailand.
As a tourist, your sphere of cave exploration would be utterly restricted due to conservation and safety reasons. Indeed, the art of cave exploration is as dangerous as - and as scientific as - scuba diving, and its reward just as fascinating. A recent expedition of the Takobi Cave by the SMCC (Shepton Mallet Caving Club, UK) in 2003 revealed a very complex structure - 7.3km long with 14 entrances and formed on three levels.
The image on the right tells something about the subterranean expansion of the Takobi Cave. The cave diagram was adopted from Compass Points, Issue 32 and waypoints from Caves of Tak Province.
Ban Nong Luang and the border
Formally called Ban Lo Tho in Karen, this village once served as the southern gate of the historical route between Mae Sot and Umphang. Christian Gooden describes it as "a relatively large sleepy village that had that last-place-before-the-border atmosphere."
The border - and the end of R 1167 - is 5km away from the village proper, but still within the village boundary for lack of any other villages in-between. In 1993, Christian Gooden pursued R 1167 and crossed the border unknowingly.
Beyond Nong Luang, we continued riding for some distance on a road that increasingly diminished and seemed to be going nowhere. The vegetation each side was encroaching on the trail, and the few houses that we passed were either burnt down or abandoned, giving rise to an uneasy feeling in us. In what seemed like a piece of no man's land or extraterritory, we wondered if we were still in Thailand or already in Burma. Suddenly, 21 kms out from Um Pang, we bumped over the brow of a low hill and entered Pa Toei, inside Burma. We did not know this until a couple of concerned men, shabbily dressed, pointed out the fact to us.
In 2001 on his return visit, he found the border crossing just as unattended and unregulated.
After Nong Luang, which had changed little in eight years, you continue 4.7km up an increasingly remote and lonely paved road, with the thickly forested border ridge shadowing your progress close at hand on your left side, to a checkpoint, above which, on your right side, a Thai army camp is positioned high up in trees. When we reached the unmanned checkpoint, no one came down from the camp to prevent us going further or took any interest in us at all. Actually, it was we who got one of the camp soldiers to come down and advise us. He said we could continue to the border - there was no one there, but we could not mistake it - but should on no account cross it. The Karen village of Pa Toei now lay unambiguously in Burma, and we should not visit it because DKBA and Burma army troops were roaming around 3 kms away or less (from the Thai camp), and owing to them the situation was dangerous. We rode on 800 m and came to the deserted frontier, which had an atmospheric feeling of nothingness about it.
The Thai asphalt road simply ended, after which a very poor dirt track went off slightly downhill, through scrub and trees, towards Pa Toei, which was not visible. To the left of the road lay an old wooden guard hut, derelict and overgrown with weeds and vines. Next to this stood a tall bamboo pole, from the top of which a Thai flag fluttered. On the right side of the road, a pointed wooden sign said simply 'Thailand', given in English on the side facing Burma and in Thai on the other. It was shadeless and very hot at the crossing. There was no one around, and the silence, except for the cracking of bamboos in the sizzling sun, was thunderous, eerie. As before, we could so easily have gone on to Pa Toei, or just a little way to look down on it... But, of course, we did not. We had the feeling that we were being watched from out of the trees. The place was spooky, and the thought alarmed us that nothing stood between us and the DKBA, who could so easily interfere with us, rob us, apprehend us, or worse.
Reference
Takobi Cave
http://home.freeuk.net/smk/caving/smcc/thai2001/
http://www.shepton.org.uk/gallery/album05 |
Area 6. R 1288 (to Ban Boeng Kloeng)
Like R 1167, R 1288 is merely a transit for the vast majority of tourists. Unlike R 1167 which throws you out in the middle of nowhere at the road's end, R 1288 has a solid destination in the name of Boeng Kloeng - a thriving yet exotic trading center for the surrounding communities on both sides of the border.
Elevation Chart: R 1288
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Route description (compiled from Three Pagodas)
| km | 0: | R 1288 branches off from R 1167 |
| km | 4.4: | Ban De Lo Ki |
| km | 6.5: | Way L to Thee Lor Su Waterfall (25km) |
| km | 27.5: | Ban Klo To ( = Mae Chan) |
| km | 30.9: | Ban Nu Sae Po |
| km | 40.0: | Way R to Ti Jo Si (or Tee Chor See) (or Chi Cho Chi ?) |
| km | 48.3: | Way L to Ti Po Ji (12.5km) |
| km | 49.9: | Ban Nu Po (R) |
| km | 50.8: | Nu Po refugee camp (L, 100m) |
| km | 58.6: | Way L to Kui Le Tor (1km) |
| km | 71.9: | Ban Boeng Kloeng |
| km | 73.8: | Thai-Burmese frontier and border gate |
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One geographic feature of R 1288 is that it crosses over three mountain ridges and spans across four river valleys. Starting in the Huai Nam Dan valley, it crosses over a 20km chunk of the Umphang Wildlife Sanctuary and enters the Huai Klo Tho valley. Then another 25km section of the Umphang Wildlife Sanctuary and enters the narrow valley of the Mae Chan River. The third - and the last - ridge is smaller in scale but of considerable geo-political significance. This is the watershed divide between the Mae Chan River and the Suriya River - the former joins the Mae Klong River and flows into the Gulf of Thailand whereas the latter flows out of Thailand and into Burma, joins the Salween River and empties in the Andaman Sea. That such a critical watershed divide wasn't adopted as the border between the two countries is a historical curiosity. What it signifies in terms of anthropology and ecology is that Boeng Kloeng - being on the other side of the main watershed divide - has more affinity with the Karen State than with the rest of Thailand.
Ban Klo Tho
Or "Ban Mae Chan" as has been officially renamed recently. This name poses a bit of confusion as the village is situated along Huai Klo Tho. The Mae Chan River lies some 4km to the west.
Huai Klo Tho, along its path to the Mae Klong River, forms the Thee Lor Su Waterfall, and this obviously disjoins the usual riverine communication with downstream villages. Ban Klo Tho must have been difficult to access from the Umphang side before the arrival of R 1288.
Like Ban Nong Luang, Ban Klo Tho was once connected with Mae Sot across Dooplaya - Ban Mun Ru Chai (south of Mae Sot) serving as the northern border gate. Christian Gooden gives an account of Ban Klo Tho and a track to the Burmese border. On his first visit in 1993:
Dominated by a white pagoda atop a karstic needle, it marked a significant unofficial border crossing point to the Karen State and Burma. Some kind of market was taking place on the playground of Klo To school, and here people told us about a big black market over the border at a place called Ban Mai (=new village). Ban Mai was seven or eight kms away, and we could visit it if we wanted. As the morning was not far advanced, we decided to have a quick look. A very bad 4WD track led past a checkpoint, over the Mae Chan river [Huai Klo Tho?], past a military camp, to the Karen settlement of Nupa Towa. Spread out along the route in three sections, the village had its own white chedi and was enhanced by many red-flowering trees. As we continued through woods and jungle, outcroppings in the form of a razor blade reared up above the vegetation to the south. A post at the trackside with no sign on it led us to believe that we had reached the border. Picking our way through a maze of criss-crossing tracks and paths, we went down a hill to arrive suddenly at a KNLA checkpoint and customs gate. We were at Ban Mai or, in Burmese, Sa Kaang Thit (Sakaangthit/Sakaanthi).
Then on his 2001 revisit:
It is no longer possible to visit Sa Kaang Thit. Nor is there any reason to do so. On or around 13 February 1997, the Burma army (helped by the DKBA), during its sweep up the border, overran the village, just as it seized all the other KNU villages and territory in 6th Brigade area opposite Um Pang district. It burned down all the houses and shops in Sa Kaang Thit, and precipitated the flight into Thailand of all the local Karen and Indo-Burmese Muslims. Initially, they fled to Nupo Towa, where they took refuge, but were later moved along with Karen and Muslims sheltering at Ti Jo Si, Nu Po and Nong Nok Ped (8,000 people in all, of whom up to 2,000 may have been Muslims) to a big new refugee camp at Nu Po village. Nothing much remains of Sa Kaang Thit. People at Klo To and Thai army soldiers in Nupo Towa said that it now consists of just half a dozen houses, is dangerous because some land has been mined, and that Klo To people are afraid to go there, both because of the mines and because of the DKBA.
Nu Po Refugee Camp
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Ban Nu Po and the refugee camp

Google Earth + MapMagic Thailand
Boeng Kloeng

Google Earth + MapMagic Thailand
Boeng Kloeng - eastern outskirts

Google Earth Quickbird
Boeng Kloeng - topography

SRTM + Landsat (30% overlay)
Boeng Kloeng - border crossing

Photo from Three Pagodas
Singular border - alignment

Singular border - northern end

SRTM + Landsat (30% overlay)
Singular border - southern end

SRTM + Landsat (30% overlay)
Suriya River and Kasat River

Landsat, RGB 742, resolution 1/8 |
Quoting Christien Gooden:
This large camp, run under UN auspices, contains 7,000 - 8,000 refugees and possibly as many as 10,000. The inmates are Karen and Indo-Burmese Muslims from Burma. Up to 2,000 of them are Muslim traders, many from the former black-market village of Sa Kaang Thit (Ban Mai), opposite Klo To. The refugees fled Burma in February 1997, when the Burma army and its fledgling protege the DKBA seized KNU 6th Brigade area opposite Um Pang district. Coming from Sa Kaang Thit, Mae Ta Ro Ta and many other villages, they sheltered initially at Nupo Towa (Between Sa Kaang Thit ang Klo To), Nong Nok Ped, Ti Jo Si (between Sa Kaang Thit and Nu Po) and Nu Po itself, before being gathered together and relocated to Nu Po refugee camp in about 1998, perhaps because the initial camps came under attack from SLORC troops or were threatened with attack by the DKBA.
Boeng Kloeng
The last stretch of R 1288 is covered by the Google Earth Quickbird, providing us with exquisite details of this remote corner of Thailand. In utter frustration, however, the Quickbird coverage fades out just 1km short of the end of R 1288 and the border crossing, covering only the eastern outskirts of Boeng Kloeng.
Notice, in the image on the right, the border cuts across crop fields, or, rather, the land is tilled across the border. This phenomenon can also be seen at the Cambodian border of Chanthaburi Province, where the border is defined by straight lines rather than a natural boundary like a river or a ridge.
Christian Gooden describes his first visit to this border village in 1992 as follows:
Boeng Kloeng (also Beung Keung) was much bigger than Kui Le Tor. With around 300 inhabitants, it was a mixed Karen, Burmese, Indo-Burmese and Lao place. This 'Lao' puzzled us because we could not understand how people from Laos could have got so far from home. We had a theory that they were the descendants of Khmu teak workers who had perhaps been brought here from Laos in the early years of the 20th century by British logging companies operating in Thailand and Burma. But, in fact, they were just Thai people - 'Lao' was an old way of saying 'northern Thai'. The village was one of the most picturesque we saw anywhere on our journey. Set against a backdrop of rocky cliffs and pitted denticular mountains, it lay astride a long dusty, but shady and tranquil 'street'. Considering how rural and remote Boeng Kloeng was, many of the wooden houses lining this thoroughfare were surprisingly large and ornate. Some had lovingly tended front gardens with a profusion of colourful blooming plants and bushes.
We were surprised to find the main street humming with activity. In both directions, there was a steady flow of people, old Chinese bicycles and bullock carts, piled high with rice and other goods. Even more astonishing, we found one or two beaten-up motorbikes and pick-ups. Where did they go? Did they no more than ply the main street? And where had they come from? Had they been helicoptered in? The mystery was solved when we learned that there was a track behind Boeng Kloeng, across the border and that most of these people were Karen refugees from Burma. In fact, in the days before our arrival there had been a massive influx of people, vehicles, food and animals into Boeng Kloeng, all fleeing in the face of a swingeing SLORC offensive. They were mostly being housed in a refugee camp at the bottom of the village near the river, and, when we went down to have a look, we found everybody in the process of settling in.
Then, on his revisit in 2001:
In February 2001, the village was completely transformed relative to what it had been nearly a decade earlier. As we rode into it and up the main street, I recognized almost nothing, except the local geography, and felt disoriented. With the completion of the Um Pang/ Boeng Kloeng road, at the end of which the village lay 86 kms S of Um Pang, Boeng Kloeng had been prised out of its age-old bucolic languor and was now connected up with the outside world. Where once you had had to trek several hours to it, now trucks, pick-ups, silor and motorcycles - although only a handful - rumbled in and out. From the edge of 'town', where it metamorphosed into asphalt, the road, skinny and mediocre since Nu Po, swept broad and wide through the centre, right up to the border. In 2001, the silor fare from Um Pang to the remote southernly frontier community was about 100 baht, and the same back to Um Pang.
If the advent of the new access road was one big difference between then and now, another concerned the main street. My slide photos record a magical narrow dirt track winding between shade-giving palms and wooden houses (see photo). This had been replaced by a wide, cambered, hot and shadeless, tarred highway that struck through the heart of Boeng Kloeng, cutting it in two (see companion photo). The main drag seemed much longer than I remembered, stretching almost 2 kms from the village entrance sign at the eastern Christian end of 'town' to the border gate at the western Buddhist end. It was a long thin habitation, hemmed in to the N and S by low wooded ridges. The school, centrally located to the N of the main street, had been enlarged and rebuilt, and the small wooden field hospital where I had once had my ankle treated had turned into a regular health center (to the left/W of the school). Also to the N of the main drag lay the wat (right/E of the school), which was more impressive than I recalled. A beautiful monastery-temple in the Burmese style, it nestled in a palm-shaded compound, quite near a small pagoda perched on a rock.
Boeng Kloeng had grown considerably from about 300 inhabitants in the early 1990s to some 1,000 in 2001, living in roughly 200 houses - extensive compared to Kui Le Tor or Nu Po. The refugee quarter we found in 1992 had already disappeared by 1993, but had probably reappeared a couple of times subsequently, until the events of 1997, after which the same refugees were undoubtedly definitively and for the long term housed in Nu Po refugee camp. The village now had many more shophouses and several simple eating places. You could even buy fuel at a couple of booths in the SW part of the main drag. But there was still no electricity in Boeng Kloeng - in the evening, illumination was by candles or battery-powered neon strip lights. Some atmospheric and picturesque elements remained. Bullock carts still trundled up and down the main street, some having crossed from Burma. Elephants continued to come in from Lae Tong Ku and elsewhere to be loaded up with provisions and goods in Boeng Kloeng before returning (see photo). Rishi followers from Lae Tong Ku and its associated cultist villages, with their topknots and colourful clothing, walked earnestly around, carrying out their errands, and there were girls with tanaka-adorned faces. Everywhere there were groves of lush green betel palms, quite especially to the N of the road near the village entrance, and in front of numerous houses people were drying and shelling betel nuts. It was a regular industry in Boeng Kloeng, with the nuts being sold in Mae Sot. We saw a cattle truck in the village, indicating that traders come to buy beef from Burma. Also, we met two Thai men from Lampang, who had come to buy 'Myanmar' beans. They said that they just waited until people brought sacks of beans across the border. The duo must have waited a long time, and the beans must have been very cheap to justify such a long and difficult journey. If you want to get an impression of what Boeng Kloeng and its main street used to be like before the arrival of the new road, explore up and down the second 'main' street, which lies S of the new main drag. A winding rutted dirt track passes idyllically through backwoods homesteads among coconut and betel palms, fording the Huai Boeng Kloeng a couple of times, which is the stream after which the village is named (kloeng = swamp or marsh in Karen).
But perhaps the most significant change locally, one which impacted greatly on Boeng Kloeng, was that the border crossing and territory across the frontier was no longer controlled by the KNU Karen, but by the DKBA and Burma army, who had seized the land opposite in February 1997, during the tatmadaw's offensive sweep up the Burmese side of the border at that time. The border at Boeng Kloeng used to be really open - I do not recall ever seeing any kind of formal crossing point or boundary or checkpoint there - and Karen as well as Thai civilians, Thai soldiers, aid officials, medical personnel and farang crossed at will into Burmese KNU-held territory, perhaps to visit Lae Tong Ku or Mae Ta Ro Ta, or to go N to Klo To or S towards Sangkhlaburi on the 4WD track that went up the border on the Burmese side. All that had made Boeng Kloeng a busy free-wheeling place. But now the cross-border traffic had stopped except for a few peasants going to and fro with produce. For fear of the DKBA and Burma army, no one went to Lae Tong Ku through Burma any more, and Mae Ta Ro Ta had fallen. No KNU Karen crossed the border here any longer, and absolutely no Thai soldiers or farang. So no more little extraterritorial treks and thrills there now. Ordinary Thai civilians can and sometimes do cross for whatever reason (mostly trading), but, as our old friend and former guide Sooksi confirmed, no KNU sympathizer, including himself, went further beyond the crossing point (see colour photo) than the shops, about 20 metres away - if they went beyond that, they would be shot.
Border Alignment
Here we need to discuss the singular border alignment around this area which strays from the watershed divide and cuts across rugged plains. At the headwaters of the Huai Waley, the river border gives way to the land border (watershed divide) and faithfully follow the ridge of the Pawan Range for some 130km to the western peak of Khao Mu Gatu (9km north of Ban Boeng Kloeng). Then it follows the ridge for another 1km to the eastern peak but this is no longer the main watershed divide but a minor one that separates Mae Chan River tributaries. Then from the eastern peak, the border is defined by a series of straight lines - cutting across two valleys (Suriya and Kasat) - until it rejoins the main watershed divide at a 910m peak (name unknown) 5km south of Ban Tilaipa.
Observing accurate maps like the L 7017 or MapMagic Thailand, one can draw six straight segments as a first approximation. On closer examination, each segment seems to be composed of following numbers of straight sub-segments:
Segment 1: at least 3, preferably 4
Segment 2: 2
Segment 3: 1
Segment 4: 2
Segment 5: 1
Segment 6: 1
According to International Boundary Study: Burma - Thailand Boundary, "the boundary is demarcated by eight straight line vectors." Here we face a discrepancy. To trace the border on the L 7017, we need at least 10 straight segments. It's either the L 7017 is not accurate or the above mentioned paper is outdated (1966 publication).
Defining the border with invisible straight lines generally poses the risk of unintentional trespassing and the need to impose restricted zones to prevent such - an economic loss to say the least. Due to the rugged terrain and numerous crossing streams, the situation here is even more troublesome than that along the Cambodian border of Chanthaburi Province. It is no wonder, then, that the Burmese army and the DKBA, whether knowingly or unknowingly, easily wander into Thai territory along this singular border. Quote:
LIB 317 also has units actively patrolling up to 2 kilometers inside Thailand between Bueng Klung and Lay Ton Ku, (A. Umphang, P. Tak), as of this report. (Thailand Map-mgrs 1:50,000, 47P MT, the following grids: MT5430,5440,5339,5340,5543,5442,5443,5341,5441.)
http://www.prayforburma.org/News/hrr_report_0602.html
Between March 10 and 20, SLORC soldiers, patrolling over kilometer inside Thailand, stole B.2,000.00 from a Karen village. The village is located in a beetle-nut orchard, approximately 3 kilometers south of the Thai village 'Bueng Klueng" west of Umphang. (By foot this village is 7-8 kilometers from Bueng Klueng.) This robbery and violation of Thai sovereignty was reported to the BPP unit at Bueng Klueng with no discernible effect.
http://www.burmanet.org/bnn_archives/1997/bnn0497n689.txt
Reference
Boeng Kloeng
http://www.flickr.com/photos/mrhuevo/tags/bungkhlung/ |
Area 7. Ban Mong Khwa and Ban Le Tong Khu
A series of villages line along the Mae Chan River in the south of R 1288. The Google Earth Quickbird image captures a dirt track that runs from R 1288 past Ban Kui Loe To (Kui Le To) to Ban Mong Khwa (Mong Gua). I could only identify some of these villages. The L 7017 is a good source of information, but of rather historical value. Some villages listed on the L 7017 cannot be confirmed on the Quickbird image - and vice versa. A logical classification is:
1. Listed on the L 7017 and can be confirmed on the Quickbird image - long-established villages
2. Not listed on the L 7017 but can be confirmed on the Quickbird image - newly established villages
3. Listed on the L 7017 but cannot be confirmed on the Quickbird image - defunct villages relocated to elsewhere
From Ban Mong Khwa westward, reportedly, an obscure dirt track - passable by 4WD during the dry season - connects to Ban Le Tong Ku, but this can not be traced even on the Quickbird image. Also, Ban Le Tong Ku itself is a little way off the Quickbird coverage - at the moment.
All these villages except Ban Kui Loe To are technically within the Umphang Wildlife Sanctuary, but numerous patches of new and old crop fields are scattered around the valley.
| Quickbird scan: R 1288 - Kui Loe To - Mong Khwa - Le Tong Ku |

Background (switch):
1. Google Earth
2. SRTM |
Overview
Landmarks 01 - 11 are described below. Landmarks a - d are defunct villages - still of archaeological curiosity. Landmark e is out of the Quickbird coverage, but Christian Gooden passed this site in 1992, and describes it as a deserted rishi village whose villagers had mostly moved to Lae Tong Ku.
a. Ban Che Sa Le De
b. Ban Kui Ta
c. Ban Tawe
d. Ban Khamu Ta Chu
e. Ban Loe Ka Nae Tha
The broken white line that connects east of Ban Mong Khwa and Le Tong Ku is traced from the L 7017. This line may or may not coincide with the current trek route to Le Tong Ku.
Two short, white, straight lines in the southeast of Ban Boeng Kloeng suggest possible trek routes from Ban Boeng Kloeng to Ban Mong Khwa, bypassing Ban Kui Loe To. |
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01. Ban Kui Loe To
0.9km (from R 1288)
Listed on the L 7017 (established before the L 7017 publication - circa 1980)
Christian Gooden trekked to this village in 1992 (R 1288 ended at Ban Nu Po then) and spent a night at the village headman's house. Quote:
Around a parched clearing, we found about 20 wooden thatch-roofed Karen houses... Like Nu Po, Kui Le Tor was a less interesting Karen village. It did not even seem to have a shop. Of course, there was no electricity in the village and no vehicles. The only way to arrive here was on foot. All necessities had to be transported either in baskets on people's backs or by elephant. In among the houses and all over the central compound, domestic animals wandered around - buffaloes, pigs, goats, cows, chickens and cocks.
Then in his 2001 update:
In 2001, the way 1km to Kui Le Tor was a very bad trail indeed. We biked in from the 'main road' to find that the Karen village had hardly changed at all since Nittaya and I twice trekked through it nearly a decade earlier, in 1992 and 1993. It was still a small, traditional, relatively backward place, with uncertain staring people, many sitting around. An incongruous phone box had meanwhile arrived, powered by solar batteries and communicating via satellite.
At the southern edge of Ban Kui Loe To, the route crosses over the Mae Chan River. I cannot confirm on the Quickbird image whether there is a bridge. |
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02. Ban (name ?)
2.1km
Not listed on the L 7017 (new establishment)
Between 02 and 03 - around km 3.9 - the route again crosses over the Mae Chan River. I cannot confirm on the Quickbird image whether there is a bridge. |
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03. Ban (name?)
6.1km
Not listed on the L 7017
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04. Ban Kui Cho Ken
10.2km
Listed on the L 7017
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05. Ban Kui Chu Dae (?)
13,0km
Not listed on the L 7017
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06. Ban Kui Kloe (?)
17.0km
Not listed on the L 7017
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07. Ban Mong Khwa
18.2km
Listed on the L 7017
In Ban Mong Khwa, the route turns westward and connects to the next village. Also, an obscure track - only partially traceable on the Quickbird image - stretches southward connecting to even remote villages like Ban U-nai, Ban Kru-bo and - possibly - Ban Mae Chanta. I will discuss these villages in the next chapter. |
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08. Ban Po Ka Ta (?)
19.6km
Not listed on the L 7017
The end-of-the-road village in an ordinary sense, and the beginning of the trek to Ban Le Tong Ku. Reportedly, a 4WD can make it all the way to Ban Le Tong Ku during the dry season. |
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09. ?
Situated along the trek route to Ban Le Tong Ku. Possibly a forestry office? |

SRTM + Landsat (30% overlay) |
10. Ban Le Tong Ku
Listed on the L 7017
Historically, the quickest - and most popular - route from Boeng Kloeng to Le Tong Ku was to cross the border at Boeng Kloeng and follow the Suriya valley - the route Christian Gooden took. This is no longer a viable choice in the same sense that the historical route from Waley to Umphang is closed. Thus, the roundabout route via Kui Loe To and Mong Khwa is the regular route now. |

SRTM + Landsat (30% overlay) |
11. Ban (name?)
Not listed on the L 7017
Out of the Quickbird coverage. Sources indicate that there is a village at this location. This village may be a stopover along the "third route" to Ban Le Tong Ku. Quoting Christian Gooden, "It does not cross the border, remaining in Thailand, although rather hugs the frontier. It crosses three ridges, takes 4-6 hours on foot, and is said to be arduous. The route is used mainly by local Karen and Lae Tong Ku cultists with elephants, who come to Boeng Kloeng to collect supplies, before returning." |
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12. road trace
Apparently, this dirt track is connected to Boeng Kloeng (mostly traceable on the Quickbird image) - thus a 4WD can make it this far.
From this point on, Village #11 can be reached along two Suriya tributaries. I cannot confirm on the Landsat image whether this track connects to the village, but fairly likely. |
Ban Le Tong Ku
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TAT brochure |
That such a remote Karen village is receiving increasing attention from the tourism industry in recent years is a bit amazing as well as alarming. With villagers wearing a topknot on their head, and with a distinct cultist religion and practices, Ban Le Tong Ku is seen along the line with the long-neck Paduang in Mae Hong Son or the hunter-gatherer Phi Tong Luang in Nan and Prae. One good prospect for the villagers, though, is that, as has been the case with hilltribes in north Thailand, once their commercial value as a tourism resource is recognized, persecution by Thai Government officials as "non-Thai" may tone down, and their cultural practices may enjoy more respect - albeit on a commercial basis.
Christian Gooden stayed at Ban Le Tong Ku for five days in 1993, taking up an abode at the local school, and spares 19 pages in describing this village in his Three Pagodas.
The first thing we noticed about Lae Tong Ku was just what a spread out village it was. Actually, it was more like a village within a village, with a strict cultist hub and wat located amid a wider outer band containing a mixture of dwellings belonging to both cultists and ordinary Karen. We thought that our walking was over for the day, but it was a good km to the school, and another one beyond that to the village proper...
We asked the dorchodor about the eating habits of the rishi people. It was true, they said, that the cultists ate only the meat of game, not of domestic animals. They ate deer, boar, monkeys (four kinds), snakes, jungle fowl, fish - whatever they could hunt in the wild. Within the confines of the village, we would find no chickens, ducks or pigs. There were elephants, buffaloes and cows, but the people did not eat these, only used them for work. Neither did the rishi followers drink alcohol, although they did smoke. This was why the school and the army camp, even the hospitality house, were outside the real core village. Anybody who liked chicken or pork, or who enjoyed a drink, lived, literally, beyond the pale...
We had heard that a Karen Christian missionary woman, who spoke some English, was living near the mini waterfall, but we never encountered her. In the early 1990s, the principal trouble in the village was religious conflict between the sect and a Californian missionary, Mr Christopher. Cultural imperialists like him generated considerable ill feeling, which was then indiscriminately directed against any visitor, as we were later to discover...
From an early hour, the teachers had been blasting the immediate area through a tannoy with the Thai national anthem and Isaan pop music. This they did every morning...
The school was visible from where we sat, but we were surprised to see him together with only seven pupils, lined up before the Thai flag. We commented on the small number of children, and the other teacher explained that mostly the pupils did not come during the day. They went out collecting jaak and teak leaves to make roofing, and came to class in the evening. Altogether, there were 57 schoolchildren, aged between 7 and 15 years...
The second teacher took us on a guided morning tour of the village. Again, we were struck by the distances we had to walk and by how fragmented the place was. Often, houses stood quite isolated among the trees and fields. We saw also how relatively prosperous and established Lae Tong Ku was, compared to, say, Kui Le Tor. It was a study in self-sufficiency. There were rice and cereal fields (altogether some 100 and 50 rai respectively), and cotton, sugar cane and tobacco plantations. Fruit was a significant part of the local economy, people cultivating durian, grapefruit and betel trees. Of course, growing wild, were coconut and banana palms. Another important crop was chillies and sesame. In many places, we saw chillies and betel nuts drying in the sun, and in one spot we found a rotary mill, driven by an ox, grinding the oil out of sesame seeds. In many parts of Thailand, cereals were harvested more than once a year. Here there was just one annual crop. Some of the rice and other products were sold to Karen in Burma or exchanged with them for salt, dried fish, shrimp paste and tobacco. Most families were engaged in weaving, both of cotton and bamboo. The finished cloth, mats and baskets were mainly for personal use. In one house, we watched black gunpowder being prepared. Considering that the cultists people did not eat domestic quadrupeds, we were surprised to see so many cows and buffaloes wandering around. A recent census in Lae Tong Ku counted 81 cows, 39 buffaloes and also 7 elephants. But nowhere did we find a single chicken, duck, pig or goat.
Area 8. Ban Thi Pho Chi and vicinity
Ban Thi Pho Chi (or Tipoji) is situated in the geographical heart of the Umphang Wildlife Sanctuary, and in curious isolation. Other than the omnipotent and omnipresent means of access on foot - and the difficult and probably restricted track to Ban Klo Tho thence Thee Lor Su - the only access road is a rugged 4WD track from R 1288.
Where the L 7017 shows its location, the Quickbird image only shows crop fields with, on closer inspection, several houses thinly scattered around - far from the image of an established village. The Quickbird image, in turn, shows a solid village some 3km to the south, where the L 7017 doesn't show any sign of human habitation. My tentative deduction is, some time ago somehow, Ban Thi Pho Chi was relocated to a nearby site, and villagers commute to the former (and nearby) site to work on their crop fields. Numerous patches of new and old crop fields scatter around the area, suggesting that the villagers still practice shifting cultivation, much to the disliking of the Forestry Department.
Area 9. Northwestern Recess
The upstream Mae Chan river valley seems to be a curious area to explore. Few maps show any details of this area, yet there are villages.
Elevation Chart: Mae Chan River

The elevation chart indicates a steep gorge between Ban Chi Cho Chi and Ban Kui Loe To, probably causing the riverine communication difficult between these two areas.
Scrutinizing the Landsat image, there seem to be several access roads to this valley. From Ban Nu Po, for example, a northwestward trail may connect to the southern end of the valley. More directly, there is probably a 4WD track connecting R 1288 and Ban Chi Cho Chi. Christian Gooden describes a R 1288 turnoff at km 52.3 (from Umphang):
"Way R to Ti Jo Si (Tee Chor See), another Karen village, where in early 1997 many 'Burmese' Karen and Muslims sheltered as SLORC troops seized KNU territory across the border."
Probably, Chi Cho Chi = Ti Jo Si. Along the way, the track passes near an unidentified deforested area (1.2km x 1.5km). The 1989 Landsat image doesn't show this deforestation, so it must be a recent creation. Possibly a temporary refugee camp prior to integration to the Nu Po refugee camp? Then there should be - and does seem to be - a 4WD track connecting Ban Klo Tho and Ban Ma-O Kho, though I can only partially trace its route. Once in the valley, there seems to be a 4WD track connecting each village.
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Northwestern Corner

Landsat 3D
Border Crater

SRTM + Landsat (50% overlay) |
Ban Moeng Kloeng is probably the last regular village. As the SRTM image indicates, the village is situated at a pass (1225m (NW peak) - 840m (pass) - 1130m (SE peak)) and this explains its odd - yet strategic - location.
Beyond Ban Moeng Kloeng still can be seen signs of human activities (forest clearing) and traces of dirt tracks - sometimes crossing the border ridge.
Along the border ridge lies a tri-point peak (1670m) where the watersheds of Moei, Suriya and Mae Chan rivers meet. The highest peak in the vicinity (1922m) lies 1.5km northwest (in Burma) from this tri-point.
Border Crater
At the northern end of this area is a curious landscape - a crater-like depression (diam. 2.5km) hemmed in by the border ridge and what may turn out to be the second border ridge.
The rainwater is entrapped in this depression and there is no way out as a visible river or stream. As the Landsat image does not show any massive body of water here, the rainwater must sink underground - but to resurge on which side? Here the geography defies the convention of taking the watershed divide as the political boundary. Along the Thai-Burmese border, there are about a dozen such cases of unclear watershed, but rarely of this scale.
The L 7017 takes the somewhat higher northern ridge as the border. So do many other maps which adopt their mapping data from the L 7017. Then there are other government and non-government maps which take the somewhat lower southern ridge as the border. I haven't heard of any border dispute between Thailand and Burma at this particular site. Perhaps the L 7017 is correct. Or, perhaps, it is outdated.
As of year 2000 (Landsat image date), there seems to be minimum sign of human activity there. Whichever ridge may turn out to be the border, may this curious landscape retain its pristine forest, and be spared the fate of human exploitation or development.