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It marks the boundary between the valleys of the Romanche and the Guisane, a tributary of the Durance which has its source at the col. The valleys are linked by the route départementale 1091 (formerly the national route 91) (Grenoble – Le Bourg-d'Oisans – Briançon). The Lautaret is one of the lowest points on the ridge line which separates the "north" (mainly in the Rhône-Alpes région) and "south" (mainly in the Provence-Alpes-Côte d'Azur région) geographic areas of the French Alps.
The Col has long been used as a communication route between Grenoble and Briançon, and as a step for reaching Italy across the Alps through the Col de Montgenèvre.
Route Nationale 91 at Col du LautaretCol du Lautaret in the late AutumnCol Du Lautaret 1994
Cycle racing
Details of the climbs
From the west, the climb starts at Les Clapier, near Le Bourg-d'Oisans, from where the climb is 34.2 km (21.3 mi) long, gaining 1,312 m (4,304 ft) in altitude, at an average gradient of 3.8%, with the steepest section being at 7.5% in the first kilometre.[2]
The eastern approach commences at Briançon, from where there is 27.7 km (17.2 mi) to the summit, gaining 853 m (2,799 ft) in altitude, at an average gradient of 3.1%, with a maximum of 5.2%.[3]
Tour de France
The Tour de France first crossed over the Col du Lautaret in 1911, when the leader over the summit was Émile Georget.[4] Since 1947, the Lautaret pass has been crossed over 40 times by the Tour de France, although most of these have not been classified for the "King of the Mountains" competition, usually when the pass is crossed on the descent from the Col du Galibier (As of 2014[update]).[5]
Appearances in Tour de France
Since 1947, the passages which have been categorized have been:[5]
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