Grand Perron des Encombres

Grand Perron des Encombres is a mountain summit at 2,824 meters in the Vanoise massif, positioned between Maurienne Valley and Les Belleville Valley. The peak features a limestone structure with alpine meadows spreading across its slopes and an orientation table near the top for identifying surrounding mountains.

The mountain took shape during the Jurassic period when limestone deposits accumulated and hardened over millions of years. This geological process created the rock layers visible on the slopes today and defines how the peak appears.

Local herding traditions shape how people interact with the surrounding alpine pastures during warmer months. These practices remain visible in the landscape and influence how the area is used and valued by communities living nearby.

A marked trail from Petit Col des Encombres leads to the summit with clear signage throughout the route. Seasonal conditions affect accessibility, as snow and mountain weather can make the path more challenging during certain months.

Alpine ibex herds gather regularly on the plateau areas after Petit Col des Encombres and can often be spotted from the trail. These wild animals are adapted to the steep terrain and move across the high slopes throughout the day.

Location: Les Belleville

Location: Saint-Julien-Mont-Denis

Location: Saint-Martin-de-la-Porte

Elevation above the sea: 2,824 m

Website: http://geodesie.ign.fr/fiches/index.php?module=e&action=fichepdf&source=carte&sit_no=7325706

GPS coordinates: 45.29733,6.45035

Latest update: December 15, 2025 13:26