From the west, the climb commences at Quintal and uses the D241 before reaching the D41 after 3.5 km (2.2 mi). The total climb is 11.3 km (7.0 mi) long gaining 922 m (3,025 ft) in height at an average gradient of 8.2%.[5] This is the route used on Stage 20 of the 2013 Tour de France and is ranked as an Hors catégorie climb.[1][6] The route to the summit from the start at Annecy crosses the Col de Leschaux (944 m (3,097 ft)) after 17.5 km (10.9 mi) before descending to Saint-Jean-d'Arvey.[1]
