About
Chiang Mai Thailand by UTMB - 20K is a 20.0 km half marathon category race with 800m elevation gain in Thailand. Terrain: mountain, jungle, forest. Near Doi Inthanon National Park. Rated moderate difficulty. Located near Chiang Mai, Chiang Mai.
Organized byUTMB
Difficulty
|20
Moderate28 KE
KM-Effort = distance (km) +elevation gain (m)100
Based on the ITRA standard.
Elevation Density40 m/km · Moderate
Elevation Density =elevation gain (m)distance (km)
Time limit:7h
Run Conditions
MountainJungleForest
Weather in Nov
Temperature
17 – 23°C
Mild
Humidity
Extreme
Rainfall
97 mm
Moderate rain
Sunshine
10.4h/day
~16 rainy days expected
Registration
Website
Deadline
Not specified
Entry fee
2,900 THB(~$88)
Travel & Logistics
VenueDoi Inthanon National Park Headquarters, Chom Thong District, Chiang Mai 50160, Thailand
Google MapsView on Maps
Nearest airports
CNX - Chiang Mai International Airport96 km | ~1h55 driving time
Race Day Info
GPX File
Not yet released, check again closer to race date
BiB Collection
Not available yet, check again closer to race date
Mandatory Gear
Coming soon
Other Distances
Community
Reviews
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Race data is actively being refined. If something looks off, .
Sources: utmb, website · Enriched 2026-07-07