Distance
Terrain
Difficulty
2nd 100 Thailand is a 100km trail ultramarathon held in Pai, Thailand, with 4500m elevation gain and a 30-hour cutoff. The event is part of a larger ultra running challenge series in Pai featuring 100K, 200K, 300K, and 500K distances.
Elevation gain 4500m
Trail running in Pai mountains
30-hour time limit
500 kilometers over 7 days
168 hours of self-discovery
Start / Finish
Pai District Office, Mae Hong Son, Thailand
Pai District Office, Mae Hong Son, Thailand
Terrain
Race Day
On the day
Before you enter
Other questions
The 100km course has approximately 4500 meters of elevation gain. Other distances vary.
Yes, the event welcomes international participants.
Pai typically has mild to cool weather in November, with average temperatures around 20-30°C. Runners should be prepared for possible rain.
No qualification is required for this event.
Entry fee not listed
Check the race's registration page for pricing.Pai, Thailand
Sunday, November 22, 2026
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