Casse Rousse

Casse Rousse is a mountain peak in Chamrousse standing at 2,225 meters, characterized by distinctive gabbro and serpentinite rocks that cover its slopes. These dense, dark stones resulted from ancient geological processes deep within the earth and were brought to the surface over millions of years.

The peak gained attention during 19th-century alpine exploration when mountaineers opened access routes through the region. The unusual rock formations attracted scientific interest from researchers seeking to understand the geological development of the Alps.

Local mountain guides regularly organize geological expeditions to study the rock formations and natural features that characterize this peak.

The summit can be reached via marked hiking trails from Chamrousse, with conditions varying based on the season. Winter access requires proper cold-weather gear and caution due to snow and ice on the slopes.

The rocks here visibly show how ancient ocean floors were lifted upward during mountain formation, making it distinctly different from typical Alpine peaks. Visitors immediately notice the unusual appearance of the surface compared to surrounding mountains.

Location: Chamrousse

Elevation above the sea: 2,225 m

Made from material: gabbro, serpentinite

GPS coordinates: 45.12942,5.90863

Latest update: December 14, 2025 20:00