81 kmTrail🇨🇦 Mont-Tremblant, Canada

Borealys Mont-Tremblant Odyssee 100K

Saturday, 14 August 2027Estimated dateIn 10 months · Start 05:00

An 81 km UTMB World Series ultra through the forested Laurentian hills around Mont-Tremblant, with steep climbs and crews allowed only at Base Nord.

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Facts checked 10 Oct 2026 against borealys.utmb.world, borealys.utmb.world.

Elevation gain

3,600 m

Mountain · ↓ 3,600 m

Start altitude

231 m

above sea level, from terrain data

Temp at start

15°C

Peaks around 20°C

Entry fee

≈ $250

Open entry

Finishers

—

typical year

Course

Loop

18h cut-off

Getting thereFly into YUL (Montréal), about 105 km from the start

Course map

A detailed route is not available for this race yet. The marker shows the race location.

Elevation profile

Mountain: about 3,600 m of climbing and 3,600 m of descent. A detailed profile isn’t available for this race yet.

Race-day weather

At start

15°C

Peak during race

20°C

Humidity

88%

Chance of rain

21%

Wind

7 km/h

Race day in past years

Historical averages for 14 August ±3 days, 2016–2025, from 05:00 for 5 hours (70 days sampled). Source: Open-Meteo / ERA5.

What time could you run here?Adjust your goal time for this course’s hills and typical race-day weather.Race time calculator →

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<a href="https://irun42.com/race/borealys-81k" title="Borealys Mont-Tremblant Odyssee 100K on iRun42"><img src="https://irun42.com/badge/borealys-81k.svg" width="300" height="120" alt="Borealys Mont-Tremblant Odyssee 100K: course, elevation and race-day weather on iRun42" /></a>