Marathon des As - Besançon 2026-09-13 42.195km / 21.1km Besançon / France Visit Event Website → About This Event Location Besançon Country France Date 2026-09-13 Distances 42.195km / 21.1km Why This Event Flat and fast marathon along Doubs River in Franche-Comté capital ideal for performance running. More Runs in France View all runs in France