Marathon La Fortifiée begins in Parfondeval, a village in the Thiérache region of Aisne, Hauts-de-France. This late-March road marathon covers the full 42.195 km. A relay option is available for teams wishing to share the distance. The race is closely linked to Parfondeval, recognized as one of France’s most beautiful villages, and is presented as the sole marathon in Aisne.
The course combines village roads and rural paths, featuring enough elevation changes to discourage attempts at a personal best. A runner's account characterizes it as a low-key marathon with a pleasant atmosphere, helpful organizers, scenic surroundings, and several charming villages en route. The event maintains a small, local feel, yet its terrain offers more challenge than a flat city marathon.