From the Avanne sports complex, this loop will take you to the Planoise hill, discovering the fortress, its batteries and fortifications, while enjoying exceptional views of the Besançon hills and the Doubs valley. You will evolve in an enchanting forest atmosphere, between single trails and wider paths, pleasant as summer as winter. And if you like challenges, the rise of the fortress will be the opportunity to time you with the Defitrail technology on this section of the route !