Glacier de Bionnassay

Glacier de Bionnassay is a large ice field in the Mont Blanc range near Saint-Gervais-les-Bains with a broad, snow-covered surface. Its face shows deep crevasses and ice formations that shift gradually over time as it descends the mountainside.

This ice field formed over centuries in this part of the Alps and has long been a feature of the mountain landscape. Over time, shifts in climate have influenced its size and shape, marking the passage of natural changes.

The name Bionnassay comes from the local valley and has long connected mountain communities to this place. Visitors can observe how the cable car has shaped access for generations and made this location part of the regional identity.

Access to the glacier starts with a cable car ride from Saint-Gervais-les-Bains to Nid d'Aigle, followed by a short hike upward. Walking on the ice surface itself requires proper footwear and care, as crevasses exist and conditions change with the seasons.

The ice moves visibly down the mountainside each year, continuously creating new crevasses and surface shapes. This motion is noticeable to the eye and reveals the slow power of glacial movement over extended periods.

Location: Saint-Gervais-les-Bains

GPS coordinates: 45.83330,6.80830

Latest update: December 14, 2025 11:00