Trail des 6 heures de la Tonnelle is a quirky six-hour trail race held at the Tonnelle site in Marcillé, Nouvelle-Aquitaine, France. Taking place in early April, it begins at 13:00 with runners tasked with completing the same short forest loop as many times as possible within the six-hour limit. This event bridges trail running and ultra-running, with a format that is accessible for those seeking a solo challenge or a team effort.
The course consists of a 3 km loop through natural terrain, featuring moderate elevation changes: approximately 15 m of gain for relay participants and 30 m for solo runners. Participants can run individually for the entire six hours or form relay teams of three or six. Organized by LA PAMPA, the race benefits a charitable cause, lending a sense of community to the repeated-loop format, shifting focus from solely distance or speed.