Whistler 100K is a 100 km ultra trail of Ultra Trail Whistler by UTMB 2025 in Whistler, Canada. The race starts on August 21, 2025. The course climbs 5400 m+ and descends 5110 m−, between a low point of 563 m and a high point of 2159 m. By gradient, 41% of the distance is uphill, 42% downhill and 17% flat. The longest climb runs 6.0 km at an average 20.3% grade (1210 m of vertical). The longest descent runs 10.6 km at 10.7% (1138 m of vertical). Surface: 69% trail and 25% smooth. Flat-equivalent effort: 143.9 FlatKM.
142 finishers completed the 2025 edition. Men's winner: Alexander King (United States) in 11:27:49. Women's winner: Sarah Allaben (United States) in 13:11:45.
This page has the full results and splits, interactive elevation profile, gradient matrix, pacing and nutrition planner and weather climatology for Whistler 100K.
Other distances of Ultra Trail Whistler by UTMB 2025Whistler 50K (50.0 km)
Other editions of Whistler 100K2026
Official websitewhistler.utmb.world
