Cross de Chapet is a local running event held in Chapet, a village in the Yvelines department west of Paris, typically scheduled for early October. It combines road running, cross-country trail sections, and shorter races for younger participants, resembling a community race day rather than a single-distance competition. The primary choices are a 10 km road race and a 6.6 km trail race, supplemented by 2.6 km and 1.3 km courses for children and juniors.
The 10 km race consists of three approximately 3.33 km loops, and the 6.6 km trail race uses two approximately 3.3 km loops. The courses traverse the streets of Chapet, a village situated on the banks of the Seine, with some accounts mentioning nearby natural terrain, technical paths, and inclines and declines. The Comité des Fêtes de Chapet is the organizing body, and aid stations and changing facilities are available at the venue.