The Ultra-Trail du Mont-Blanc is the world's most iconic mountain ultramarathon, circumnavigating the Mont Blanc massif through France, Italy, and Switzerland. With 10,000m of elevation gain, it is one of the most demanding races in the sport.
UTMB World Series FinalsITRA 6 Endurance Points
Est.
2003
Distance
171km / 106mi
Course
Loop
Surface
Trail
Elev. Gain
10000m
Elev. Loss
10000m
Field Size
~1,700
When
August
Time Limit
46h
THE COURSE
Gain
+10000m
Loss
-10000m
MI 0
KM 0
Chamonix Start
The race starts in the heart of Chamonix with thousands of spectators lining the streets. The energy at the evening start is electric as runners begin their journey around Mont Blanc.
ELEV: 3400ft
MI 30
KM 48
Col du Bonhomme
The first major climb takes runners up to the Col du Bonhomme, leaving France and crossing into Italy. The exposed ridge offers stunning views of the Alps in every direction.
ELEV: 7641ft
MI 50
KM 80
Courmayeur
The Italian town of Courmayeur provides the biggest crew access point at roughly the halfway mark. Runners descend into town through the night with the Mont Blanc massif towering above.
ELEV: 3900ft
MI 62
KM 100
Grand Col Ferret
The Swiss border crossing at Grand Col Ferret is the highest point on the course. Runners climb through alpine meadows with views of the Grand Jorasses and Mont Blanc glaciers.
ELEV: 8323ft
MI 106
KM 171
Chamonix Finish
The finish in Chamonix is one of the most emotional in ultrarunning. Runners descend from the final climb and enter town to massive crowds and the iconic UTMB finish arch.