About Namtok Phu Sang
Namtok Phu Sang is a warm waterfall located inside Phu Sang National Park in Phu Sang District, Phayao Province, near the Thailand-Laos border. It is notable for its naturally warm water of around 33-35°C flowing year-round from a thermal spring, unlike most Thai waterfalls. The waterfall cascades over limestone terraces surrounded by forested hills within the national park.
Visitors guide
Visitors can expect a low, wide limestone waterfall with warm, clear water flowing into shallow pools suitable for wading and bathing. The setting is forested within Phu Sang National Park, with walking paths, viewing areas, and natural terraces. Facilities are basic national park style. The area is compact and can be explored on foot, with opportunities for photography, relaxing in warm water, and enjoying the surrounding forest landscape.
Key highlights
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Naturally warm waterfall with water temperature around 33-35°C
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Flows year-round due to thermal spring source
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Limestone cascade forming shallow bathing pools
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Located inside Phu Sang National Park on the Phayao-Chiang Rai border
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Forested mountain setting with easy walking access
Culture & Context
Known locally as a natural warm-water source used by nearby communities for bathing and relaxation; promoted as a distinctive natural attraction of Phayao and Phu Sang National Park
Route
| By air | Fly to Mae Fah Luang Chiang Rai International Airport (CEI), then drive approximately 90-110 km via Chiang Kham to Phu Sang |
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| By road | Accessible by road via Highway 1093 from Phu Sang town and Chiang Kham; approximately 30 km from Phu Sang town centre to the waterfall inside Phu Sang National Park; private car or hired songthaew recommended |