Mae Ngud Somboon Chon Dam

Mae Ngud Somboon Chon Dam holds back the Mae Ngat river in Mae Taeng district, about 55-60 km north of Chiang Mai, creating a reservoir that sits inside Sri Lanna National Park. Unlike most Thai dams, it’s less about the concrete structure than what floats on the water behind it: a cluster of moored houseboats (reuan phae) that have made this one of northern Thailand’s better-known overnight-on-the-water trips, alongside day visitors coming for kayaking, swimming, and boat rides through the reservoir’s forested coves.

Entry is 20 THB per adult if you’re getting on the water — children go free, and if you only want to view the dam wall and mist-covered mountains from the shore, staff will usually wave you through without charging. Private longtail-boat charters run around 600 THB per boat for up to six people on a round trip out to the coves; houseboat operators run independently of the park and are worth booking ahead, since weekend availability tightens up fast, particularly in cool season (November-February) when the mist over the water is at its most photogenic. Most houseboat packages bundle a couple of meals with the overnight stay, and the water itself is the point — expect quiet evenings, no Wi-Fi at most moorings, and mountains on every side once the day-trip boats have gone back to the pier.

Insider Tip: Arrive by mid-morning if you’re day-tripping rather than staying on a houseboat — afternoon cloud can roll in over the mountains by 2-3pm in the wet season, and the calmest water for kayaking or photos is early.

The dam connects directly into Sri Lanna National Park, so it’s easy to combine with a wider day out in the park rather than treating the reservoir as a standalone stop. Watch out: houseboats here range widely in comfort — some are genuinely rustic bamboo rafts with shared bathrooms onshore, others are more built-up with private facilities — so check photos and reviews of the specific operator before paying a deposit, rather than assuming “houseboat” means the same thing at every price point. Bring sun protection for the boat trips; there’s little shade once you’re out on open water.