Overview
- Organisers postponed the UTMB 'race reine' by two hours on Friday to avoid brief but intense storms, and the 2,500 starters left Chamonix after the delay under wet, changeable conditions.
- Race direction altered segments of the 174 km loop and removed higher-risk climbs so leaders would reach high cols after the worst weather had passed.
- Support races earlier in the week produced decisive results: Frédéric Tranchand won the OCC in rainy conditions and Cristian Minoggio took the CCC after organisers shortened that course.
- Local authorities and residents report heavy crowding and traffic during UTMB week, prompting measures such as car-free commitments from many runners and limits on sensitive zones.
- Medical experts and organisers warn of high physical risks on the course, noting roughly 40% abandonment rates from digestive problems, extreme fatigue and musculoskeletal issues as participation and media exposure grow.