42 km du Mont-Blanc 2026

The 42 km du Mont-Blanc begins at 06:45 in Chamonix-Mont-Blanc, Haute-Savoie, taking runners on a mountain trail marathon around the Mont Blanc area. The course is approximately marathon distance, measured between 42 and 43.6 km, with significant climbing: around 2,540 to 2,550 meters of elevation gain. It has a 10-hour time limit and qualifies as a UTMB Index 50K race, placing it in the long mountain-race category. The field is large for a high-alpine trail race, with over 2,200 finishers recorded in recent results. The elite field is international, with top men recently hailing from Italy, Belgium, France, Kenya, Switzerland, Spain, Japan, and Sweden. Leading women have come from Kenya, Switzerland, the United Kingdom, Spain, Italy, and France. Winning times of approximately 3 hours 43 minutes for men and just over 4 hours 15 minutes for the first woman indicate the pace of the leaders despite the terrain.