Cross de l'Erdurière is a local cross-country race series held at the l'Erdurière site in Couëron, near Nantes, scheduled for November. Organized by the athletics section of Étoile sportive couëronnaise, the program features numerous short races instead of a single main event. Fifteen races are offered, with distances ranging from 915 meters to approximately 8.5 kilometers, in addition to a 10 km trail race.
The cross-country courses are constructed using four loops measuring 650 m, 800 m, 1,845 m, and 2,270 m. This allows each age group to run a distinct combination on the same l'Erdurière terrain. The initial race is designated for adapted sport. The event also includes the Éveils category for very young athletes, noted by the organizers as uncommon for a cross race. Approximately 80 young runners from the Couëron club are anticipated. Races may bear sponsor names, and a supervised bag check is provided for participants.