Chiang Mai, Thailand
Chiang Mai by UTMB 63K
Deep jungle single-track and sustained ridge climbs in northern Thailand's UTMB World Series stop.
Logistics & Terrain
Terrain style. Deep jungle single-track, rugged mountain ridges, and relentless, sustained climbing through northern Thailand's highest peaks.
The killer variable. Punishing sustained vert (up to 9,800 m+ on the 100-miler) layered with tropical jungle microclimates and altitude swings.
As a UTMB World Series race, the Chiang Mai course is designed to test absolute endurance. Climbs are long, sustained, and relentless. You'll cover dense humid jungle canopy then break onto exposed ridges where the sun resets your hydration plan block by block.
Vertical Climbing Mechanics
Monitor acute-to-chronic workload ratio — sudden hill-interval spikes will trigger IT band or Achilles issues within two weeks. Anchor your build with one weekly long climb day and one steady vert-heavy back-to-back on the weekend.
Nutrition Scaling
Long jungle hours destroy gel-only palates. Build your grocery list around real-food alternatives — salted potatoes, custom rice cakes, broth at aid stations — alongside 70–90 g of carbs per hour. Sodium runs 700–1000 mg/hour in the canopy.
Other distances at this event
Stop guessing your ultra logistics
Plug your Chiang Mai 63K distance and vert into Mise to get a periodized training calendar, weekly meal plan and grocery list tuned to true vertical effort.
Build my Chiang Mai 63K plan →Free. No account or email required.