December ultramarathons in Thailand

Technical mountain terrain above 1,600m in Tak province, with pine forests, ridge lines, stream crossings, waterfalls and sea-of-fog views.

Rugged Khao Mai Kaew trails with floating rocks, stream crossings, sandy paths, forest sections, steep climbs, and a finish ramp

Winding trails through lush forests and rugged mountains in northern Thailand, with pristine wilderness and sweeping views

Rugged mountain paths, lush forests, and river crossings with opportunities to engage with indigenous communities and camp under the stars

Rugged 100K trail route through Pak Chong and Khao Yai, with rural roads, forest paths, rolling hills, waterfalls, and sweeping viewpoints.