Lac Cornu
A glacial lake at about 2,276 metres in the Aiguilles Rouges range, with clear water and far fewer visitors than Lac Blanc. It makes a challenging full-day hike.
Lac Cornu lies in the valley north of the Planpraz transfer station on the Brévent route. You cross over the Col du Lac Cornu and descend to the lakeside. The one-way hike takes about 2 hours, climbing roughly 500 metres and including a stretch of steep scree, so it suits experienced hikers. The water is icy and crystal clear, surrounded by barren high-mountain scree, with ibex around and Mont Blanc behind you. You can return via the Lac Blanc direction. Start early in the morning, watch for afternoon thunderstorms, and carry plenty of water.
Opening hours
Summer: trail open all day
Nearby sights
- Le Brévent
- La Flégère
- Chamonix Town Centre
- Musée Alpin de Chamonix
- Lac des Gaillands
- Lac Blanc
- Parc de Merlet
- Bossons Glacier