Boréalys Mont-Tremblant by UTMB
Boréalys Mont-Tremblant by UTMB – Tremblante 50K
Village Tremblant
Race guide
Updated 18 July 2026
The Tremblante 50K is the mid-distance race at Boréalys Mont-Tremblant by UTMB, covering 46 km with a substantial 2314 m of climbing through the Laurentian mountains of Québec. Starting and finishing in Village Tremblant (230 m), the loop tackles two major summits — Pic White (864 m) and Edge (830 m) — linked by long descents and technical forest trail, making for a demanding day with more than 2300 m of vertical packed into a course just short of 50 km. With crew access and cut-offs at Base Nord (Sunday 11:39) and a later cut-off at Nansen (Sunday 15:15), the Tremblante is a race of two big climbs and the runnable, rooty terrain in between. It rewards runners who can climb steadily, descend well, and manage their effort across a profile that never settles into an easy rhythm.
The Course and Terrain
From Village Tremblant at 230 m the course climbs to its first summit at Pic White (9.1 km, 864 m), gaining more than 600 m in the opening third. It then descends to Base Nord (19.2 km, 357 m), the first crew point and cut-off, before climbing again to the second major high point at Edge (28.9 km, 830 m). From Edge the route drops to Nansen (36.4 km, 393 m) and rolls back to the finish in the village at 46.1 km and 230 m. The terrain is classic Tremblant: steep ski-slope climbs, technical Laurentian singletrack laced with roots and rock, and long descents that test tired quads. The two summits at Pic White and Edge bracket the race, with Base Nord sitting in the valley between them, so the profile reads as two big up-and-downs joined by rolling forest trail. There is little sustained flat, which keeps the effort constant from start to finish.
Where the Race Is Won and Lost
The Tremblante turns on its two climbs. The first, from the village up to Pic White at 864 m, gains over 600 m in 9 km and is easy to overcook early — the runners who hike it efficiently rather than racing it arrive at Base Nord with legs still intact. The second, from Base Nord (357 m) up to Edge (830 m), is nearly 500 m of climbing in the middle of the race at around 29 km, and this is where fatigue starts to bite and the field spreads out. The descents matter just as much. The long drop from Pic White to Base Nord and again from Edge to Nansen (393 m) punish anyone who has trashed their quads, and the rolling final stretch from Nansen back to the village at 46 km is where a disciplined runner makes up ground. Protecting the legs on the first descent into Base Nord pays dividends over the whole second half — save enough downhill strength to run the closing kilometres rather than shuffle them.
Pacing and Fuelling to the Cut-offs
Two cut-offs shape the day: Base Nord at 19.2 km (Sunday 11:39) and Nansen at 36.4 km (Sunday 15:15). Base Nord doubles as a crew point, so plan it as your main refuelling and reset stop — it sits at the low point between the two big climbs and is the natural place to restock food, fluid and anything you need for the ascent to Edge. From Base Nord you have roughly 10 km of climbing to Edge before the descent to Nansen, so leave the checkpoint fully stocked. The waypoint spacing — up to around 10 km between stations — means carrying enough to be self-sufficient over each climb. Fuel steadily from the start; the sustained ascent to Pic White makes early calories easy to neglect and expensive to recover. Hike-and-eat the steep pitches, take advantage of the runnable descents and the rolling Nansen-to-finish section to keep drinking, and treat the second climb to Edge as the point where good fuelling discipline separates a strong finish from a long grind home.
Conditions to Expect
The Tremblante runs on the forested ski terrain of Québec's Laurentians, where summer conditions can be warm and humid with the chance of afternoon showers. Much of the course is shaded under tree cover on the climbs and descents, which helps in the heat but keeps the technical singletrack damp and slick, especially early in the day or after rain. The exposed summit areas around Pic White (864 m) and Edge (830 m) can be cooler and windier than the village, so a light layer is worth carrying. Underfoot, expect the roots, rocks and loose ground typical of the Laurentian Shield — footing that demands attention on the fast descents to Base Nord and Nansen. Shoes with dependable grip are a real advantage on both the steep climbs and the technical downhills. Pace the two big ascents with discipline, protect your quads on the descents, and the Tremblante 50K delivers a genuine mountain ultra in one of Québec's premier trail-running settings.
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Checkpoints & cut-offs
✓ Course data verified against the official source (2026-07-17) · official source
0 km · 230 m · —
9.1 km · 864 m · —
19.2 km · 357 m · Sun 11:39
28.9 km · 830 m · —
36.4 km · 393 m · Sun 15:15
46.1 km · 230 m · —
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