About
AIA One Billion Trail by TMS - 51K is a 50.6 km ultra race with 2,597m elevation gain in Thailand. Terrain: forest, mountain. Rated hard difficulty. Located near Hua Hin, Prachuap Khiri Khan.
Organized byNot specified
Difficulty
Not part of any indexed race series.
Hard77 KE
KM-Effort = distance (km) +elevation gain (m)100
Based on the ITRA standard.
Elevation Density51 m/km · Hard
Elevation Density =elevation gain (m)distance (km)
Time limit:13h
Run Conditions
ForestMountain
Weather in Nov
Temperature
24 – 30°C
Warm
Humidity
Very high
Rainfall
108 mm
Moderate rain
Sunshine
10h/day
~13 rainy days expected
Registration
Register
Coming soon
Deadline
Oct 31, 2026
Entry fee
Early Bird – 3,000 THB(~$91)until Jul 31, 2026
Regular – 3,700 THB(~$113)
Travel & Logistics
VenueNot found — check the website for more details
Google MapsNot found — check the website for more details
No airport within 200 km
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
Not available — check the website for more details
Other Distances
Community
Reviews
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Race data is actively being refined. If something looks off, .
Sources: website · Enriched 2026-05-23