Le Grammont

Le Grammont is a mountain summit in Valais that rises 2172 meters above Lake Geneva and is composed of sedimentary rock formations. From the top, you can see across the Rhone Valley toward the Mont Blanc Massif on clear days.

The slopes of Le Grammont witnessed a significant geological event in 563 when a massive landslide occurred near the Roman settlement at the Rhone-Lake Geneva junction. This disaster reshaped the local landscape and settlement patterns in the region.

The mountain paths intersect with traditional Swiss Alpine routes, connecting local communities through a network of marked trails and mountain shelters.

The hike to the summit takes about three hours on a well-marked trail roughly 14 kilometers long. You can park at Le Flon in Miex near the trailhead for easy access.

A British Lancaster bomber crashed on the summit during World War II after Swiss air defenses fired on the aircraft over neutral airspace. The wreckage remains a striking reminder of this wartime incident.

Location: Valais

Elevation above the sea: 2,172 m

Made from material: sedimentary rock

Part of: Préalpes médianes nappe

GPS coordinates: 46.35742,6.82119

Latest update: December 12, 2025 14:23