The 20th Bornes d'Andrésy is a half marathon held in Andrésy, west of Paris. It starts at Parc des Cardinettes on the last Sunday of November. The city of Andrésy, with the Office Municipal des Sports, organizes this race, which has taken place annually since 1982.
Over 2,000 runners participate, including elite athletes, club runners, beginners, younger and older individuals, and handisport athletes. The event is listed on the French Athletics Federation's road-racing calendar, and the half marathon serves as a qualifier for the French Championships.