Trail du Vallon is an annual trail-running event in Marcillac-Vallon, southern France. The routes traverse varied terrain around the village, featuring technical singletrack, changing countryside, and broad views over the local hills.
A notable point on the course is the passage by the Saint-Jean-le-Froid chapel, where runners find an aid station and relay teams make their handovers. The event offers hiking options associated with Pink October, with all profits from these hikes supporting La Ligue contre le cancer. Registration includes a cold meal; signing up on site incurs an additional 2 euros.