ClermonTrail is a night event in Clermont, Oise, requiring headlamps. The program combines trail running with an 8 km hike. Race options have included short urban-trail distances like 8 km and 13 km, plus a 16 km version with approximately 350 metres of elevation gain.
The organizers call it a “wildly urban” race, reflecting a format that uses more paths, more elevation, and less road than previous editions. Athletic Club Clermontois organizes the event, Chronopale handles timing, and runners are provided with practical race-day amenities like aid stations and changing rooms.