Embark on an epic adventure as part of the 100K final race, often referred to affectionately as the "little sister" of the iconic UTMB. This ultra-endurance journey begins in Courmayeur and winds its way through breathtaking landscapes all the way to Chamonix. Participants will traverse a challenging yet rewarding course that showcases some of the most stunning Alpine scenery imaginable. The route offers runners an intimate connection with nature, featuring rugged terrain and panoramic views at every turn. As they push their limits over 100 kilometers, competitors experience not only the physical demands but also the rich history and cultural heritage embedded in this storied region. This race is a testament to the spirit of endurance running, inviting athletes from around the globe to test themselves against some of the most picturesque backdrops that the French Alps have to offer. The 100K course weaves through mountain passes, charming villages, and across verdant valleys, providing runners with an immersive experience that combines stunning natural beauty with a rigorous athletic challenge. Each step taken along this route is not just about reaching the finish line but also embracing the journey itself – immersing oneself in the awe-inspiring landscapes of Courmayeur and Chamonix, where history meets modern endurance sports. As participants make their way through the race, they will encounter a supportive community of fellow runners, volunteers, and local residents who celebrate this annual event with enthusiasm. The final kilometers leading into Chamonix are particularly memorable, as athletes cross the finish line to the cheers of spectators and amidst the vibrant atmosphere that characterizes these iconic races. Whether you're an experienced ultrarunner or a seasoned athlete looking for your next challenge, the 100K offers an unforgettable experience in one of the world's most renowned running destinations.
Races Offered
HOKA UTMB Mont-Blanc - CCC
Aug 28, 2026
straighten
Distance —
101K
terrain
Type —
Running
timer
09:00
Weather History
These values represent the 3-year monthly averages for August in Courmayeur.
thermostatTemperature
5.0° / 15.4°
wb_sunnyFeels like
2.8° / 13.3°
light_mode
Avg sunshine hours
12h 18m
water_drop
Avg rainfall
1.8 mm
ac_unit
Avg snowfall
0.2 cm
air
Avg wind speed
4.5 km/h (Light breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (4.9)
humidity_mid
Humidity
77.7%
wb_twilight
Sunrise
06:33
nightlight
Sunset
20:37
About Courmayeur
Learn more about the host city, Courmayeur.
Courmayeur is a skiing and mountaineering resort at the head of Valle d’Aosta, in northwest Italy. At 1224 m elevation, it has a spectacular location near the foot of Mont Blanc.