20km mountain loop past Ban Mae Klang Luang's terraced rice fields
A 20-kilometer loop at Doi Inthanon National Park Headquarters highlighting the terraced rice paddies of Ban Mae Klang Luang village, set within Thailand's highest national park. A scenic introduction to high-altitude trail running with 800 meters of gain and a 7-hour cutoff.
Suitable for first-timers
Chiang Mai, ThailandNovember 29, 2026
Inthanon 20 is a loop trail race in Chiang Mai, Thailand, held on November 29, 2026. The course covers 20.14 km, climbs 919 m, and has a 7h cutoff.
| Location | km | Elevation | Cutoff |
|---|---|---|---|
Doi Inthanon National Park Headquarters Start | 0.0 | 1,250 m | — |
B1 Pha Mon Mai Village Aid Station | 9.8 | 1,194 m | — |
B2 Mae Klang Luang Village Aid Station | 15.8 | 1,064 m | 5h30m1:30 PM |
Doi Inthanon National Park Headquarters Finish | 20.1 | 1,250 m | 7h3:00 PM |
Aid station details for this race are still being filled in. Cutoffs and access rules come from the race’s own published information and can change — check the official race details before planning around them.
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