Glacier des Grands Couloirs, Alpine glacier in Pralognan-la-Vanoise, France.
Glacier des Grands Couloirs sits on the western face of Grande Casse, covering a steep slope that drops nearly 1900 meters in elevation. The ice field is frequented by climbers and skiers moving through the terrain in warmer months.
This glacier formed during the Würm glacial period and its current shape reflects warming since that era ended roughly 11500 years ago. The ongoing retreat of the ice mass tells the story of climate shifts affecting Alpine peaks.
The glacier belongs to Vanoise National Park, where mountaineers and skiers have shared their climbing experiences and techniques across generations.
The starting point is at the Les Fontanettes parking area around 1644 meters elevation, from which routes lead toward the ice field. Travel on the glacier itself demands mountaineering experience and proper winter gear.
A notable crevasse around 3350 meters marks the boundary between the main ice field and the rock cliffs above it. This natural feature serves as a visual landmark that helps climbers gauge their position during ascents.
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