Chiang Mai Thailand INTHANON 20 (Thailand) 2026
A loop from Doi Inthanon National Park Headquarters through the terraced rice fields of Ban Mae Klang Luang, run in the cool mountain air of Doi Inthanon.
The course tops out at 1,453 m (low point 995 m). About 50% of the distance is gentle (under 5% grade). In 2025, 99% of starters finished. The median finish was about 4 h.
Predict your finish from your ITRA index
Enter your ITRA performance index to get your finish time, aid-station splits and cutoff margins from the results of 60 finishers of this race — the same model as the TRAIL STATUS app. Nothing is saved or sent.
The app adds predictions from your training log (Strava), race-day pacing and more. Free, no sign-up.
Predict in detail from my Strava trainingOverview
- Date
- Sun, 29 Nov 2026
- Start
- 07:00
- Location
- Thailand
- Distance
- 20 km
- Elevation gain
- 800 m
- Time limit
- 7h
- ITRA
- H
- Official website
- chiangmai.utmb.world/races/INTHANON20
Elevation profile
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| 1 | 9.6 km | B6 Pha Mon Village | 9.6 km | — |
| 2 | 15.5 km | B1 Mae Klang Luang Village | 5.9 km | Day 1 13:306h 30m |
| F | 20 km | FinishDoi Inthanon National Park Headquarters（FINISH） | 4.5 km | Day 1 14:007h |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
2025 results
731 starters, 721 finishers (98.6% finish rate). Finish times of those who finished:
- Fastest
- 1h 44m
- Top 10%
- 2h 40m
- Top 25%
- 3h 14m
- Median
- 3h 52m
- Top 75%
- 4h 39m
- Top 90%
- 5h 15m
- Last finisher
- 6h 55m
"Top 25%" means one in four finishers had crossed the line by this time.
Years with a different course or different cutoffs are not directly comparable.
Other races
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- Amazean Jungle Thailand TUNNEL 100K (Thailand) 2026Sat, 2 May 2026 · Thailand · 91 km
- Amazean Jungle Thailand TUNNEL 100K (Thailand) 2027Sat, 1 May 2027 · Thailand · 91 km
- Chiang Mai Thailand CHIANG DAO 160 (Thailand) 2026Fri, 4 Dec 2026 · Thailand · 173 km
- Chiang Mai Thailand ELEPHANT 100 (Thailand) 2026Fri, 4 Dec 2026 · Thailand · 100 km
From your training log, TRAIL STATUS estimates your finish time, aid-station splits and cutoff margins for this race.
Predict my raceCompiled from each race's official information. Details can change, so always check the race's official website for the latest. Spotted a mistake? Please tell us through the contact form.
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