Odyssée 100K is a 80.7 km ultra trail of Boréalys Mont-Tremblant by UTMB 2026 in Village Tremblant, Canada. The race starts on August 15, 2026 at 05:00 AM. It starts and finishes in Village Tremblant.
The course climbs 3636 m+. With 45 m/km of climbing, this is a true mountain course with sustained climbs and descents. By gradient, 41% of the distance is uphill, 38% downhill and 21% flat. The longest climb runs 4.8 km at an average 13.0% grade (626 m of vertical). The longest descent runs 5.0 km at 12.9% (640 m of vertical). The steepest climb averages 29.1% over 0.4 km. The steepest descent drops at 33.0% over 0.4 km. Surface: 77% trail, 9% smooth, 6% technical, and 5% road. Flat-equivalent effort: 105.2 FlatKM.
Poles bring little benefit here — only about 12.0 km of pole-friendly terrain.
Quad damage risk is moderate (index 47 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 Odyssée 100K.
Other distances of Boréalys Mont-Tremblant by UTMB 2026Tremblante 50K (46.4 km)·Diable 20K (26.6 km)·Chutes-Croches 20K (14.5 km)
Official websiteborealys.utmb.world
