Trail de Grignon is a local trail-running event in Grignon, France, offering approachable distances. Participants can select from 8 km, 11 km, and 16 km trail races, suitable for beginners, those preferring shorter distances, or individuals seeking a longer local trail run.
The event also features a 9 km walk, children's races, and a canicross event for runners accompanied by dogs. This format fosters a community trail day rather than a singular race, with running, walking, children's activities, and dog-running all based at the Grignon site.