Duathlon du Caux is a run-bike event held in Yvetot, a town in Seine-Maritime, Normandy. The race base is at the Champ de foire. It typically takes place in early March and is organized by Yvetot Triathlon. The event features four races, including a two-person relay, making it suitable for more than just solo adult racers.
The race formats accommodate a wide age range. Youth races are available for 6-9 and 10-11 year olds. An XS race is offered for participants from Benjamins to Masters, and an S race is for Cadets, Juniors, Seniors, and Masters. The XS and S races also serve as qualifying events for the Normandy youth duathlon championship, from Benjamins to Juniors, adding a competitive element for younger athletes. Yvetot is accessible by train, with the station located just over a kilometre from the venue. The town is situated between Rouen, Le Havre, and Dieppe.