Ouille d'Arbéron, Mountain summit between Savoie, France and Piedmont, Italy
Ouille d'Arbéron is a summit in the Graian Alps that rises to 3,560 meters and forms the natural border between France and Italy. The peak features distinct rock layers including schist, serpentinite, and gneiss that make up its structure.
The mountain formed approximately 30 million years ago during major geological shifts in the Alps. This ancient geological history shaped the diverse rock composition and current form of the summit.
The summit is known by two names reflecting its location on the French-Italian border: Ouille d'Arbéron in French territory and Punta d'Arnas in the Italian Alps. This dual naming shows how mountains in this region have been shaped by the cultures on either side.
Reaching the summit requires mountaineering skills and proper preparation since the ascent is challenging. Two mountain refuges serve as base camps: the Avérole Refuge at 2,210 meters and the Luigi Cibrario Refuge at 2,616 meters, both offering shelter and orientation for climbers.
Climbers crossing toward the summit pass through the Col de la Valette at 3,212 meters before encountering the Bouanet Glacier at 2,900 meters. This glacier passage is a distinctive feature of the climb and shapes the overall route experience.
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