Tham LotTham Lot at a Glance
About Tham Lot
Tham Lot is a large karst cave system in Pang Mapha District, Mae Hong Son province in northern Thailand. It is notable for an underground river that runs through its main chamber and for ancient teakwood coffins found within.
The cave contains broad caverns with stalactites and stalagmites and an active stream that cuts through several chambers; guided bamboo-raft trips navigate the lower waterway and footpaths lead into the main galleries. Wildlife, archaeological deposits and large rock formations are visible in different sections of the cave.
Formed by karst processes, the cave has yielded archaeological materials including human remains and timber coffins attributed to local hill communities and prehistoric use. Local people, archaeologists and tourism operators have long recorded finds and organized visits to the site.
Situated in Pang Mapha District of Mae Hong Son province, Tham Lot lies in a karst landscape of northern Thailand; access is typically via the district town of Pang Mapha and local guides operate visits from the surrounding area.
- Teak coffins: The cave contains multiple ancient teakwood coffins and archaeological remains that have been documented by researchers and local historians.
- Bamboo-raft access: Lower passages are commonly traversed by bamboo raft under guide supervision where an underground stream flows through the main gallery.
Nearby Attractions to Tham Lot
Best Time to Visit Tham Lot
Visit in the cool, drier months (November-April) to avoid heavy rains that can flood cave passages and make trails treacherous.
Weather & Climate near Tham Lot
Tham Lot's climate is classified as Tropical Savanna - Tropical Savanna climate with hot summers (peaking in April) and mild winters (coldest in January). Temperatures range from 11°C to 34°C. Abundant rainfall (1180 mm/year), wettest in August with a pronounced dry season.
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Ideal | 11° - 26° | 19° | 4 mm | mostly sunny | 66% | 0.8 m/s | 1.5 high | 11.0h |
| February | Ideal | 13° - 29° | 21° | 6 mm | clear | 54% | 1.0 m/s | 1.8 very high | 11.4h |
| March | Ideal | 16° - 33° | 25° | 19 mm | mostly sunny | 52% | 1.1 m/s | 1.9 very high | 11.9h |
| April | Very Good | 20° - 35° | 29° | 48 mm | some cloud | 57% | 1.0 m/s | 2.1 extreme | 12.5h |
| May | Acceptable | 22° - 32° | 27° | 170 mm | overcast | 74% | 1.3 m/s | 2.2 extreme | 12.9h |
| June | Good | 22° - 29° | 26° | 144 mm | overcast | 82% | 1.2 m/s | 2.0 extreme | 13.2h |
| July | Good | 21° - 29° | 25° | 193 mm | overcast | 85% | 1.1 m/s | 1.9 very high | 13.1h |
| August | Good | 21° - 29° | 25° | 230 mm | overcast | 86% | 0.9 m/s | 1.9 very high | 12.7h |
| September | Good | 21° - 29° | 25° | 192 mm | overcast | 84% | 0.9 m/s | 1.9 very high | 12.1h |
| October | Very Good | 20° - 28° | 24° | 110 mm | partly cloudy | 82% | 1.2 m/s | 1.7 very high | 11.6h |
| November | Excellent | 17° - 27° | 22° | 48 mm | some cloud | 79% | 0.9 m/s | 1.6 very high | 11.1h |
| December | Ideal | 13° - 25° | 19° | 16 mm | mostly sunny | 75% | 0.8 m/s | 1.4 high | 10.9h |
How to Get to Tham Lot
Tham Lot and similarly named caves in northern Thailand are typically reached via provincial roads from nearby towns such as Mae Hong Son or Pai; local operators run guided trips. Bus and minivan services connect regionally, but the last mile usually requires local transport (taxi, motorbike or guided transfer). Always arrange travel with local guides familiar with trail and weather conditions.
Tips for Visiting Tham Lot
- Bring waterproof footwear and a headlamp - cave passages can be slippery and dim.
- Local guides offer safer and more informative trips; hire guides from Mae Hong Son provincial tour operators rather than attempting unguided exploration.
- Best light is in the morning when shafts of sunlight find openings and illuminate the cave interior.