Trail d'Hostun is a trail running event held in late September in Hostun, located in the Drôme Vercors region of southeastern France. Organized by Houston Trail, it guides participants along technical paths in the Monts du Matin, near the Vercors Regional Natural Park. The event features multiple race distances: La Sophie at 12 km, the 30 km Pré de Cinq Sous solo race, a relay race, and a paired race named Duo à la noix.
The official routes are not disclosed beforehand, offering participants a general idea of the course: climbs, technical trails, and mountain foothills surrounding Hostun. The event embraces a local culinary theme, referring to itself as the nutty trail where participants climb and consume ravioles, with a ravioles meal provided post-race. Entertainment is also included, presenting the event as a local running gathering with various options including short, long, solo, relay, and duo races.