The Double 8h - Buthiers is an 8-hour mountain bike endurance race held in Buthiers, located in the Seine-et-Marne department southeast of Paris. It takes place in March and follows a circuit format where participants race for the entire duration, aiming to complete the maximum number of laps possible.
The event is part of the 24h VTT and 8h VTT endurance series, which features mountain bike loops for long-distance racing. Competitors can participate individually or as a relay team, allowing for a mix of solo riders pushing their limits for eight hours and teams coordinating turns, pacing, and transitions. The entry fee is listed at 20 EUR, suggesting a focused, practical event rather than a large commercial festival.