Rir'o'trail - Besançon is a small trail-running event in Besançon, France, offering three untimed races instead of a single main competition. Participants can select a 15 km route with 300 m of elevation gain, a 10 km route with 200 m of elevation gain, or a 5 km route with 100 m of elevation gain. This format accommodates individuals seeking a brief local run as well as those preferring a longer morning on the trails.
The starts are staggered throughout the morning: the 15 km begins at 8 AM, the 10 km at 9 AM, and the 5 km at 10 AM. As the races are untimed, the focus shifts from rankings to completing a trail course at one's own pace. The Besançon event is part of the Rir'O'Trail series and is organized by Les Foulées Généreuses, with Julien Aube serving as the contact person.