Utmb 2024 Chamonix France. In 2023, the utmb started at 1800 local time (1700 bst) on. The world's most fabled and fiercely contested ultramarathon, the utmb attracts thousands of ambitious trail runners to its start line in chamonix every year.

Utmb 2024 date, start time & live tracking. Access to the occ is open to all runners with at least one.