The 10 Km de Carquefou is a 10 km road race held annually in Carquefou, a town in Loire-Atlantique, western France, typically around late winter. It is an urban race, with organizers characterizing the route as dynamic and fast, rather than a countryside run. The event also offers children’s and junior races, extending the day beyond adult participation in the 10 km.
Carquefou Athlétique Club organizes the race, with speed being a primary attraction. The course's flatness allows runners to use it for fitness testing, personal-best attempts, or as a benchmark before longer spring races like a half marathon. One recent edition saw approximately 1,200 starters and 1,147 finishers, with 223 runners finishing under 35 minutes and 624 under 40 minutes, indicating a competitive field. A runner's account mentioned three well-managed loops and “crazy density,” with 120 people finishing under 35 minutes in another edition. The race incorporates the playful phrase “Carque, foulé, ou pas !”, a pun on Carquefou and the French word for footstrike.