The Ultra-Trail du Mont Blanc (UTMB) is one of the most prestigious ultra-trail events: every year at the end of August, several thousand runners from all over the world gather in Chamonix to complete a complete tour of the Mont-Blanc massif, crossing France, Italy and Switzerland, crossing France, Italy and Switzerland, across France, Italy and Switzerland, over approximately 174 km with nearly 10,000 m of positive altitude difference. A demanding, technical and spectacular course, where performance, adventure and alpine landscapes are combined. Whether you are an elite runner or a passionate amateur, the UTMB 2026 represents an extraordinary challenge, to be included in your calendar if you aim for achievement.