The Trail de la Castagne begins at the village hall in Ailhon, with roasted chestnuts awaiting finishers. The event provides two primarily off-road choices: a 22 km trail race commencing at 09:00 and an 11 km nature race commencing at 10:00.
Both courses run 90% on trails and feature two aid stations, presenting a clear Ardèche trail day rather than a road race with some unpaved sections. The races hold departmental recognition, on-site registration is available, and the chestnuts provide a local finish that aligns with the event's name.