Diable 20K is a 26.6 km trail race of Boréalys Mont-Tremblant by UTMB 2026 in Village Tremblant, Canada. The race starts on August 15, 2026 at 08:00 AM. It starts and finishes in Village Tremblant.
The course climbs 1645 m+. With 62 m/km of climbing, this is a true mountain course with sustained climbs and descents. By gradient, 48% of the distance is uphill, 46% downhill and 6% flat. The longest climb runs 5.0 km at an average 10.4% grade (523 m of vertical). The longest descent runs 5.0 km at 12.9% (643 m of vertical). The steepest climb averages 23.8% over 0.2 km. The steepest descent drops at 25.1% over 0.3 km. Surface: 68% trail and 15% technical. Flat-equivalent effort: 40.3 FlatKM.
Poles bring little benefit here — only about 4.1 km of pole-friendly terrain.
Quad damage risk is moderate (index 23 of 100), with 36% of the load in the first half: 0 descents deserve a plan and a couple of downhill sessions before race day.
This page has the interactive elevation profile, gradient matrix, pacing and nutrition planner and weather climatology for Diable 20K.
Other distances of Boréalys Mont-Tremblant by UTMB 2026Odyssée 100K (80.7 km)·Tremblante 50K (46.4 km)·Chutes-Croches 20K (14.5 km)
Official websiteborealys.utmb.world
