About
CORE X250 Ultra Trail - 250K is a 249 km ultra race with 13,665m elevation gain in Thailand. Terrain: mountain, forest. Near Doi Luang Chiang Dao National Park. Rated herculean difficulty. Located near Chiang Dao, Chiang Mai.
Organized byCORE THAILAND
Difficulty
Herculean385 KE
KM-Effort = distance (km) +elevation gain (m)100
Based on the ITRA standard.
Elevation Density55 m/km · Hard
Elevation Density =elevation gain (m)distance (km)
Time limit:98h