AT A GLANCE
Why go?
Huai San Reservoir is a beloved roadside stop in Mae Lao District, Chiang Rai, where a public road plunges straight through the spillway of a community reservoir. In the dry season, water flows just a few inches over the asphalt, inviting cars to splash through, families to set up picnic tables in the shallows, and kids to slide down the current. It is the kind of unexpected place that turns a mountain drive into a memory.↗↗↗
The reservoir sits about 22 kilometres southwest of Chiang Rai's clock tower, along the scenic route that connects the city to Doi Chang, one of Thailand's best-known coffee-growing highlands. Designed as a conservation agriculture tourism centre by the Pong Phrae subdistrict, it doubles as the village's communal fish pond and a place for locals to relax after work.↗↗
The Road That Becomes a River
What makes Huai San Reservoir memorable is the road crossing itself. The spillway sits low enough that overflow simply sheets across the paved surface, turning a normal mountain highway into a wide, shallow river for a stretch of roughly one car length. Visitors describe the thrill of gripping the wheel as water gushes beneath their tyres, and of stepping out to discover that the current is warm, clean, and barely up to the ankle in late-season months. Locals park their trucks right in the flow, spread mats in the shallows, and grill food while children cannonball off small concrete ledges.
