The 2025 UTMB covers 174 kilometers (108 miles) and gains almost 10,000 meters (32,500 feet) of elevation as it encircles the Mont Blanc massif from Chamonix through Italy and Switzerland before returning to Chamonix. The race starts at 5:45 p.m. CEST (9:45 a.m. MDT) on Friday, August 29. Course records are Katie Schide's 22:09:31 (2024) for women and Jim Walmsley's 19:37:43 (2023) for men. Livecasting will run on iRunFar's X feed with text and photo reports, and live blogging will mirror that coverage. Sponsors Altra and Tailwind support the coverage. Multiple resources, previews, interviews, trackers, and live video feeds are available for following the race.
The 2025 UTMB is here! We can't believe it, but this is iRunFar's 15th year covering the race. This year, the UTMB course is 174 kilometers (108 miles) long and gains almost 10,000 meters (32,500 feet) of elevation as it encircles the Mont Blanc massif from Chamonix, France, through Italy and Switzerland, before finishing back in Chamonix. The race starts at 5:45 p.m. CEST (9:45 a.m. MDT in the U.S.) on Friday, August 29.
We'll be livecasting the event over on iRunFar's X feed with text and photo reports from all over the course. We'll also be live blogging the same material below in this article. A special thanks to Altra for making our coverage of UTMB possible! Thanks also to Tailwind for its support of our UTMB coverage. These resources will help you follow the race:
iRunFar's in-depth women's and men's previews iRunFar's pre-race video interviews with Len Chen, Ruth Croft, Ben Dhiman, Abby Hall, Emily Hawgood, and Ludovic Pommeret, with many more coming soon All of iRunFar's UTMB resources in one place The UTMB website, which includes tabs for the course map and elevation profile, aid stations, technical data, and more The race administration's live tracker for all entrants
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