Ultra Trail Mont Blanc

Runners competing in the UTMB ultra trail race in Chamonix, August 2025, with iconic Mont Blanc in the background
DateDistance KMElevation +/-
25-31 Aug 202517110,000

About the race

UTMB (Ultra-Trail du Mont-Blanc), is one of the most famous ultra-marathons around Mont Blanc. It’s a challenging trail race covering around 171 km with significant elevation, drawing top runners globally.  The route largely follows the hiking trails of the Tour du Mont-Blanc offering some of the most stunning views of the Mont-Blanc area imaginable!  

With a huge range of races now available (with entry requirements) or just visiting Chamonix whilst this race is on is an incredible experience!  Entry requirements include ‘running stones’ which are gained by completing other UTMB series races – even then, this race is so popular – there is also a ballot so entry to these races can take a few years of trying!

Other races are:

CCC – 101km/6050m+

OCC – 57km/3500m+

PTL (team event) – 300km/25,000m+ 

MCC – 40km/2350m+

ETC  and YCC (14-19yrs) – 15km/1200m+

The one race of the week not included in the stones & ballot system is the PDS.  148km/9300m+.  Arguably harder than the more famous UTMB,  this is a technical and wild course staring in Courmayeur and winding through the Aosta valley then back around to Savoie to an awesome finish line in Chamonix town.

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Two women celebrate after trail running to the summit of the Chapelle de Jacquicourt trail in Les Gets.

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