From the Grandes Heures Nature Outdoor Center, joint the forts of Besançon with this loop on very varied terrain. You will first climb at the foot of the Citadel Vauban, a UNESCO World Heritage Site, before continuing a succession of uphills and descents to join the Forts de Chaudanne, Rosemont and finally Planoise. AA route evolving in a very varied setting, alternating tight paths, or paved roads, in the middle of the forest or in the middle of dry grasslands or also villages bisontins. A very complete course, both technical and rolling, ideal for training while immersing in the historical richness of places.