Raid Nature du Chassezac is a Saturday adventure raid held in Gravières, a village in Ardèche situated by the Chassezac river. The start is located very close to Camping le Mas du Serre, a short walk away. The race combines trail running, mountain biking, kayaking, and orienteering, rather than focusing on a single sport.
The format provides several participation options: Aventure, découverte, junior, and initiation. There are also two-person team categories, including Raid Aventure and Raid sportif. The course winds through the Cévennes d’Ardèche region surrounding Gravières, incorporating navigation challenges and small surprises throughout the day. The organizer presents it as a weekend to enjoy with family or friends. Following the races, the event concludes with a Rock’n’Roll concert, lending it a local festival atmosphere rather than a typical event wrap-up.