The Ekiden Châtelaillon-Plage is a running relay held in April in Châtelaillon-Plage, located on the Charente-Maritime coast of western France. The primary race follows the Ekiden format: six runners collectively cover the marathon distance of 42.195 km, with the team's final time determined by the combined effort of all six participants.
Additionally, a 20 km relay is offered for teams of three runners, catering to groups seeking the relay experience without the full marathon commitment. Both races commence at 09:00, though the specific April date remains to be confirmed by the organizing body.