The UTMB World Series presents its flagship event, a 100-mile odyssey that traverses the borders of three countries and encapsulates the essence of mountain running. This legendary race winds through some of Europe's most breathtaking terrain around Mont-Blanc, offering runners an unparalleled adventure. Participants will encounter diverse landscapes as they navigate steep ascents, traverse high alpine passes, and descend rugged trails with panoramic views stretching across France, Italy, and Switzerland. The course is meticulously designed to challenge even the most seasoned ultrarunners while celebrating the scenic beauty of the Mont-Blanc massif. Runners can expect a blend of technical singletrack, rocky ridges, and expansive meadows as they push their limits against time and terrain. Each kilometer brings new vistas and challenges that test both physical endurance and mental fortitude. This race is not just about covering distance; it's an immersive experience in one of the most iconic mountain ranges on Earth. The UTMB World Series 100M Finals invites athletes to immerse themselves in a journey where every step taken through snow-capped peaks, glacial valleys, and dense forests becomes part of a larger narrative of human perseverance and connection with nature. As runners cross country lines, they will feel the spirit of international camaraderie that defines this unique event. The race is more than just competition; it's an opportunity to explore the boundaries of personal achievement while being enveloped by the majestic beauty of Mont-Blanc. The UTMB World Series 100M Finals promises a transformative experience, where every runner leaves with memories and stories that extend far beyond the finish line.
Races Offered
HOKA UTMB Mont-Blanc - UTMB
Aug 28, 2026
straighten
Distance —
174K
terrain
Type —
Running
timer
17:45
Weather History
These values represent the 3-year monthly averages for August in Chamonix.
thermostatTemperature
13.0° / 24.1°
wb_sunnyFeels like
12.2° / 23.3°
light_mode
Avg sunshine hours
11h 57m
water_drop
Avg rainfall
2.6 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
3.9 km/h (Light breeze)
opacity
Sweat loss rate
Moderate
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (4.9)
humidity_mid
Humidity
66.0%
wb_twilight
Sunrise
06:33
nightlight
Sunset
20:39
About Chamonix
Learn more about the host city, Chamonix.
Chamonix is a resort in the Haute-Savoie region of France, bordering Italy, at the foot of Mont Blanc. It's regarded as the birthplace of mountaineering and as one of its capitals.