Suthep 20 Day is a 21.0 km trail race of HOKA Chiang Mai Thailand by UTMB 2025 in Chiang Mai, Thailand. The race starts on November 29, 2025.
By gradient, 33% of the distance is uphill, 37% downhill and 30% flat. The longest climb runs 5.0 km at an average 16.1% grade (800 m of vertical). The longest descent runs 5.6 km at 15.7% (886 m of vertical). The steepest climb averages 36.3% over 0.2 km. The steepest descent drops at 29.7% over 0.6 km. Surface: 42% trail, 33% smooth, 18% road, and 5% technical. Flat-equivalent effort: 33.7 FlatKM.
Trekking poles are worth taking: about 3.5 km of the course favours them.
Quad damage risk is low (index 16 of 100): a few descents worth noticing, none that decides the result.
Historically on race day, start temperatures range from 19°C to 25°C, around 19°C at the highest point; the chance of precipitation is about 13%.
1,184 finishers completed the 2025 edition. Men's winner: Moritz Auf Der Heide (Germany) in 1:52:55. Women's winner: Ling Wu (China) in 2:26:31.
This page has the full results and splits, interactive elevation profile, gradient matrix, pacing and nutrition planner and weather climatology for Suthep 20 Day.
Other distances of HOKA Chiang Mai Thailand by UTMB 2025Chiang Dao 160 (168 km)·Elephant 100 (96.0 km)·Hmong 50 (56.0 km)·Hmong 50 Night (56.0 km)·Inthanon 50 (39.0 km)·Suthep 20 Night (21.0 km)·Inthanon 20 (20.0 km)·Chedi 20 (17.0 km)
Official websitechiangmai.utmb.world
