Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, kilometre by kilometre.
Race-day light
For a 2:55 finish (an estimate) · starting 07:00 29 Nov. Dark means the sun below civil twilight.
Climbs
4 climbs · 625 m totalbiggest firstAid stations as published on the course file
| Aid station | km | Mile |
|---|---|---|
| A B6 Phamon Village บ้านผาหมอน | 9.8 | 6.1 |
| A B1 Mae Klang Luang School โรงเรียนบ้านแม่กลางหลวง | 15.8 | 9.8 |
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Conditions typical race-day weather for 29 Nov at the start
Typical = the median of 2016–2025 for 29 Nov ±3 days at the start line; a wet day has 1 mm of rain or more. Historical weather from Open-Meteo.
Race almanac the sky on race day
Next race day Sun, Nov 29, 2026 · 7:00 AM start
First and last light are civil twilight, the sun 6° below the horizon. The moon is lit as at midnight after the start; headlamp hours count a typical finish from the start while the sun is below civil twilight. Worked out for the start line.
Reviews what runners who have been there say
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About this course
Chiang Mai Thailand by UTMB INTHANON 20 20K — 2026 covers 20.3 km (12.6 mi) with 814 m (2,669 ft) of elevation gain. That is about 40 m per km of climbing, and 811 m of descent. The course tops out at 1,453 m and bottoms out at 995 m. There are 2 aid stations on course; the longest stretch between aid is 9.8 km. The profile has 4 sustained climbs; the biggest is the climb from km 17.0, +193 m over 1.7 km at 11.1% on average (steepest stretch 37%). Race day is 29 November 2026, starting at 07:00; the sun rises at 06:41 and sets at 17:49. Typical race-day weather at the start: a high of 22°C and a low of 16°C, with a 41% chance of a wet day. The interactive map above shows the full route with its elevation profile and aid stations, built from the course's GPS file.
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Course history
- Nov 1, 2026Added to the catalog
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