Aiguille de Bionnassay, Alpine peak in Saint-Gervais-les-Bains, France
The Aiguille de Bionnassay is a high alpine summit on the border between France and Italy, sitting at 4,052 meters (13,294 ft) within the Mont Blanc massif. It forms a sharp peak covered in snow and ice, positioned at the western end of the ridge that leads toward Mont Blanc itself.
The summit was first reached on July 28, 1865, during the period when alpinists across the Alps were making their first ascents of major peaks. That first ascent placed the mountain among the early objectives of European mountaineering and set the stage for the routes climbed today.
The Aiguille de Bionnassay sits on a narrow snow ridge that many alpinists consider one of the most demanding sections in the Mont Blanc massif. Passing over that ridge is seen as a rite of passage for climbers moving toward the higher summits nearby.
The Durier Hut near Col de Miage on the French side is the usual starting point for the ascent. The exposed snow ridge near the top requires solid rope skills and experience on mixed terrain, so the peak is not suited for beginners.
Crossing the Aiguille de Bionnassay is one of the key sections of the classic Mont Blanc traverse by the western ridge, which links several high summits in a single multi-day route. This means the peak is often climbed not as an end in itself, but as one stop along a longer chain of high-altitude objectives.
The community of curious travelers
AroundUs brings together thousands of curated places, local tips, and hidden gems, enriched daily by 60,000 contributors worldwide.
