Chiang Mai Thailand by UTMB

Next Race

December 4, 2026

240

days to go

Chiang Mai Thailand by UTMB is the Asia-Pacific Major of the UTMB World Series, held annually in December in northern Thailand since 2020. The flagship Chiang Dao 160 race covers 168 kilometers with 8,100 meters of elevation gain across four mountains, including Thailand's highest peak, Doi Inthanon, under a 48-hour cutoff. Top finishers in the 100M, 100K, and 50K categories earn direct qualification for the UTMB World Series Finals in Chamonix.

UTMB World Series MajorITRA 6 Endurance Points

Est.

2020

Distance

168km / 104.4mi

Course

point-to-point

Surface

trail

Elev. Gain

8100m

When

December

Time Limit

48h

THE COURSE

Gain

+8100m

MI 0

KM 0

Doi Luang Chiang Dao Start

The race begins near the base of Doi Luang Chiang Dao, Thailand's second-highest mountain at 2,225 meters. The Chiang Dao massif is defined by dramatic limestone karst peaks and one of Thailand's largest cave systems.

MI 15

KM 24

Chiang Dao Wilderness Area

Runners traverse the Chiang Dao Wildlife Sanctuary, a UNESCO Biosphere Reserve with dense montane forest, bamboo groves, and steep ridge trails above 1,500 meters.

MI 56

KM 90

Doi Inthanon National Park

The course passes through Doi Inthanon National Park and over Thailand's highest peak at 2,565 meters above sea level. Twin royal chedis and elfin cloud forest characterize this high-altitude section.

MI 78

KM 126

Ob Khan National Park

A dramatic gorge section through Ob Khan National Park where the Ping River tributary cuts through narrow granite canyons. The terrain shifts to rocky creek crossings and riparian forest.

MI 93

KM 150

Doi Suthep-Pui National Park

The final major mountain section traverses Doi Suthep-Pui National Park above Chiang Mai city. Runners pass through protected forest on trails descending toward the city at roughly 1,600 meters elevation.

MI 104

KM 168

Finish at Chiang Mai PAO Park

The race finishes at the Chiang Mai Provincial Administrative Organization Park in the city. The finish line is a flat urban venue offering spectator access after over 100 miles of mountain terrain.