Whistler 100K is a 100 km ultra trail of Ultra Trail Whistler by UTMB 2026 in Creekside Plaza, Whistler, Canada. The race starts on August 22, 2026 at 05:00 AM. It starts in Creekside Plaza, Whistler and finishes in Spruce Grove Park, Whistler. The time limit is 24 h.
The course climbs 5100 m+. With 51 m/km of climbing, this is a true mountain course with sustained climbs and descents. By gradient, 39% of the distance is uphill, 39% downhill and 21% flat. The longest climb runs 7.1 km at an average 17.6% grade (1254 m of vertical). The longest descent runs 12.2 km at 10.2% (1252 m of vertical). The steepest climb averages 32.7% over 0.2 km. The steepest descent drops at 27.8% over 1.1 km. Surface: 65% trail, 16% smooth, and 15% road. Flat-equivalent effort: 147.0 FlatKM.
The course also passes close to Whistler Mountain (2181 m).
Trekking poles are worth taking: about 12.7 km of the course favours them.
Quad damage risk is high (index 55 of 100), with 65% of the load in the first half: 3 critical descents, the last of them run on already damaged legs. Downhill-specific preparation and a controlled early pace pay off here.
Historically on race day, start temperatures range from 8°C to 15°C, around 5°C at the highest point; the chance of precipitation is about 34%. Heavy rain of 10.0 mm or more falls on about 7% of days around this date.
228 finishers completed the 2026 edition. Men's winner: Dylan Flewelling (United States) in 11:34:05. Women's winner: Tina Muir (Great Britain) in 12:18:40.
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 2026
Other editions of Whistler 100K
Official websitewhistler.utmb.world
