Col de l'Iseran (el. 2,770 metres (9,090 ft)) is the highest paved mountain pass in the Alps. A part of the Graian Alps, it is situated in the department of Savoie in France near the border with Italy. It is crossed by the D902. The pass is part of the Route des Grandes Alpes. It connects the valley of the Isère and the valley of the Arc River between Val-d'Isère in the north and Bonneval-sur-Arc in the south. The north side of the pass road is well built with a number of galleries and tunnels, with a maximum grade of 12 percent.
On the north, are the popular ski resorts of Tignes and Val-d'Isère. The pass is only accessible by road during the summer months. In the winter it falls within the Espace Killy ski area and is easily accessed by a series of pistes and ski lifts.
Details Of The Climb:
From the north the road goes up and down and through tunnels past the lake of Tignes. Starting from Bourg-Saint-Maurice, the Col de l'Iseran is 48 km long. Over this distance, the climb is 1955 m (an average percentage of 4.1%). The last part of the climb starts at Val-d'Isère: 15 km at a consistent average of 6% (climbing 895 m).
From the south, the climb starts at Lanslebourg-Mont Cenis and is 32.9 km long. Over this distance, the climb is 1371 m (an average percentage of 4.2%). The final part of the climb starts at Bonneval-sur-Arc: 13.4 km at an average of 7.3%. (climbing 977 m) with several sections in excess of 10%.