Calvisson offers two mountain-bike formats on the same day: the Occitanie regional FFC 4X championship and a Randuro. The Randuro is an enduro-style ride, not a fully timed race. It begins in Calvisson and is open to licensed and unlicensed riders. While there's no strict level requirement, participants need sufficient downhill mountain-bike skill for the marked descending sections.
The Randuro operates like a race with marked special stages, defined starts and finishes, course tape, eight specials, two new sections, a PowerStage, and a new opening climb. Some stages are carried over from previous editions, while others are altered. Calvisson VTT maintains the event's characteristic blend of riding, mutual assistance, refreshments, camaraderie, and the 4X competition. Participants can opt for the non-timed enduro hike, while the 4X championship includes categories from young children to Masters, as well as women.