1er Challenge sur Route de France 2027

The 1er Challenge sur Route de France is a road running event held in early January in Cernay-la-Ville, located in the Yvelines department west of Paris. Participants can choose from three main distances: 10 km, a half marathon, or the full 42.195 km marathon. A two-person marathon relay is also available for teams wishing to share the distance. The 10 km course remains the same as in previous years. The half marathon and marathon courses are newer and feature more rolling terrain. The marathon begins first, with the 10 km race starting shortly after. Approximately 90 volunteers support the event. Participation numbers are substantial, with one record indicating over 300 runners in a past edition and another listing more than a thousand participants.