Outdoor Cycling Series - Haute Vallée de Chevreuse 2027

The Outdoor Cycling Series - Haute Vallée de Chevreuse is a weekend bikepacking ride in France, starting in Chevreuse and Dourdan. Riders select either 150 km or 350 km, with a choice of road or gravel routes, allowing the event to function as a long one-day push or a significant endurance ride. This event is not a competition: there is no timing, ranking, or classification. Participants ride autonomously, choosing to go non-stop or rest as they see fit, with a rider limit of 100. The series is connected to the Tour de France des Parcs Naturels Régionaux, linking it to France’s regional natural parks instead of closed-road racing.