Raid de l'U is a spring multisport raid held at Lac Kir in Dijon. Teams of two navigate approximately 45 kilometers of outdoor challenges. The race combines trail running, mountain biking, bike and run, orienteering, and canoeing. Both leisure and expert categories are available, allowing pairs to select a suitable level.
The event is organized by third-year STAPS sports science students from Dijon, in collaboration with their instructors. It has been held annually since 2001. Participants include students, amateur racers, and experienced outdoor athletes. The course may feature optional sections, additional bike loops, obstacle tasks, and unexpected challenges along the main route.