Third edition of Trail des Arpents (2026)

The event billed on the organiser site as "Troisième édition du Trail des Arpents" returns to the Yvelines in the vallée de Chevreuse and is organised by Alternature. The organiser presents the race as a community-focused, eco-friendly trail with a strong environmental charter and local partnership. The page notes this edition is scheduled for Sunday 6 December 2026 and includes messaging that this trail has been held for many years.

The official series page states two distances will be proposed for 2026 (approximately 23 km and 42 km) while the named course pages list historically used loops of 22 km and 39 km; the site explicitly records this discrepancy and says routes are still being prepared and validated. Registrations for the 2026 edition are announced to open on 1 July 2026 and the organiser says the route files will be updated on the site. Participants are advised to consult the official event pages for final route confirmations and practical information as the details remain subject to local validation.