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UTMB closes the week with the full loop of the Mont Blanc massif, leaving Chamonix at 17:45 on Friday 28 August 2026 and returning to the same square.

Chamonix

Distance
174 km
Ascent
+10,059 m
High point
2,571 mColle delle Piramidi Calcaree
Stations
26
Start
05:45 PMFri, Aug 28

The course moved on August 19, 2026, 0.2 km shorter

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The course

The whole race, as a ridgeline

▲ Colle delle Piramidi Calcaree · 2,571 m
Start0 kmFinish173.8 km · Sun 04:30 PM

▲ high point

Course & challenge

UTMB

The 174 kilometres cross France, Italy and Switzerland and gather 10,000 metres of ascent. The organizer’s checkpoint chart sets the shape of the race: Les Contamines at 32 km, the Col du Bonhomme at 45 km, Col de la Seigne at 63 km on the Italian border, Courmayeur at 83 km, then Grand Col Ferret at 106 km and 2,527 metres into Switzerland, Champex-Lac at 131 km, Vallorcine at 159 km and La Flégère as the final climb. An evening gun means the front of the field runs one night and most of it runs two.

This page belongs to the 2026 UTMB alone. Its gun time, distance, elevation figures and course reference stay with this edition rather than being overwritten when the next one is published, so a replay from this year keeps the route it was actually run on. A broadcast attached to this race places the runner on that stored course, with the climb already behind them and the passage points still ahead.

The climbs

The climbs that decide the day

  1. 3D
    01

    Tête de la Charme

    5.1 km+763 m14.9 %

    crest at km 15

  2. 3D
    02

    Refuge de la Croix du Bonhomme

    19.4 km+1,558 m8 %

    crest at km 46.2

  3. 3D
    03

    Refuge Bertone

    5.1 km+860 m16.7 %

    crest at km 87.7

  4. 3D
    04

    Grand Col Ferret

    4.2 km+757 m18 %

    crest at km 104.4

  5. 3D
    05

    Pointe du Van

    4.9 km+778 m15.8 %

    crest at km 150

The course

On the map

UTMB 2026Open the full-resolution map

The roadbook

Stations

Every station on the course. Life bases carry a barrier clock in race-local time.

  1. Chamonix

    173.8 km to Chamonix

    0 km1,036 m

    1. Les Houches9.11,007
    2. Col de Voza14.31,684
    3. Saint-Gervais22.6814Fri 10:00 PM
    4. Les Contamines32.11,147Sat 12:00 AM
    5. La Balme40.71,708Sat 02:00 AM
    6. Refuge de la Croix du Bonhomme46.52,447
    7. Les Chapieux51.61,557Sat 05:15 AM
    8. Col de la Seigne62.32,501
    9. Lac Combal68.51,983Sat 10:00 AM
    10. Arête du Mont Favre72.92,409
    11. Checrouit - Maison Vieille77.41,963
    12. Courmayeur Forum Sport Center82.21,189Sat 01:15 PM
    13. Refuge Bertone87.31,968
    14. Refuge Bonatti94.92,011
    15. Arnouvaz100.21,772Sat 06:15 PM
    16. Grand Col Ferret104.62,526
    17. La Fouly114.41,595Sat 10:30 PM
    18. Champex-Lac128.41,474Sun 02:30 AM
    19. Plan de l'Au133.31,337Sun 03:45 AM
    20. La Giète139.81,872
    21. Trient144.71,300Sun 08:00 AM
    22. Les Tseppes148.61,934
    23. Vallorcine155.81,261Sun 11:15 AM
    24. La Flégère1671,865Sun 02:45 PM
    25. Chamonix173.81,035Sun 04:30 PM

The course moved

What has changed since this course was published

Solid green is where the race runs now. Dashed is the ground it left. Newest change first.

  1. August 19, 2026

    0.2 km shorter173.8 km

    km 77.6–79.2between Checrouit - Maison Vieille and Courmayeur Forum Sport Center

    • Col de Vozanew

The whole course history

Course data verified August 19, 2026