Aiguille de Bionnassay

The Aiguille de Bionnassay is an alpine summit in the Mont Blanc massif standing at 4,052 meters, straddling the France-Italy border. The peak displays steep snow and ice formations that draw climbers of varying skill levels to test themselves on its slopes.

The peak was first summited on July 28, 1865, marking an important moment in mountaineering history during the sport's golden age. Since then, the mountain has remained a classic objective for alpine expeditions attracting climbers from around the world.

Mountain guides maintain alpinism traditions on the Aiguille de Bionnassay by passing their knowledge of climbing routes to subsequent generations of mountaineers.

The Durier Hut near Col de Miage serves as the main staging point for most climbers attempting this peak. The route demands alpine experience and solid rope work, especially when navigating snow and ice conditions.

Three major glaciers originate from this peak: the Bionnassay Glacier on the French side, the Italian Bionnassay Glacier, and the Miage Glacier extending downslope. Together these ice masses form an interconnected glacier system that reveals the raw power of alpine geology to climbers passing through.

Location: Saint-Gervais-les-Bains

Location: Courmayeur

Elevation above the sea: 4,052 m

Part of: France–Italy border, drainage divide between the Adriatic and Mediterranean seas

GPS coordinates: 45.83605,6.81867

Latest update: December 10, 2025 20:04