From Tarare, it follows the railroad track to reach Les Sauvages and then climbs to the Col du Pin Bouchain by a technical ascent where two "walls" follow one another. It will finish without great difficulty from the source of the Turdine to the Barrage de Joux.
Beetween 2h to 2h50, depending on the paceMarking : Mark orange with n°15 on a red backgroundAdmission fee : Free access.