The Cross Duathlon de Verrières-le-Buisson is an annual off-road duathlon held in the Bois de Verrières, southwest of Paris in the Ile-de-France region. TUVB Triathlon organizes the event, which adheres to the standard duathlon format: a run, followed by a bike leg, and then another run, with continuous timing through transitions.
The event accommodates a broad age range, featuring youth races for participants as young as six and adult competitions on the same day. Its forest location lends itself to a trail and bike morning rather than a road race. The rules specify bike types, excluding cyclocross and gravel bikes. Registration must be completed before race day, as on-site sign-ups are not permitted. Massy - Verrières station is located approximately 1.45 km from the event site.