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.
Based on the ITRA standard.
Temperature
17 – 26°C
Warm
Humidity
Very high
Rainfall
33 mm
Light rain
Sunshine
10.5h/day
~7 rainy days expected
GPX File
Not yet released, check again closer to race date
BiB Collection
Not available yet, check again closer to race date
Mandatory Gear
Race Results
We'll add the results link here once it's available, typically on race day or the day after
Race Pictures
We'll add the pictures download link here once it's available, typically 1–2 days after the race
CORE X250 Ultra Trail - 15K
CORE X250 Ultra Trail - 30K
CORE X250 Ultra Trail - 50K
CORE X250 Ultra Trail - 70K
CORE X250 Ultra Trail - 100K
CORE X250 Ultra Trail - 161K
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Sources: website · Enriched 2026-05-29