Les Bosses Vernonnaises is a road cycling randonnée in Vernon, France, with riders starting from Stade de Vernonnet in the morning. It is run by Vélo Club Vernonnais and sits under the Fédération Française de Cyclotourisme, so it is a club-style cyclotourist ride rather than a closed-road race for places. The event is usually listed for June, with a start window from 07:00 to 08:30.
Riders choose between three hilly routes: 50 km with 721 m of climbing, 70 km with 1,276 m, or 100 km with 1,518 m. The two shorter options are rated difficult, while the 100 km course is rated very difficult, so the name is literal: “bosses” means bumps or climbs in French. Entry is low-cost, with cheaper pricing for licensed adults and free entry for under-18s, and the listing also links the ride with sustainable development.