Gorges du Guiers Mort

The Gorges du Guiers Mort is a deep canyon in Isère where a river cuts through limestone cliffs, creating a narrow passage with steep walls on both sides. This gorge extends between Saint-Pierre-de-Chartreuse and Saint-Laurent-du-Pont and features towering rock faces that rise sharply from the riverbed.

The gorge formed over thousands of years as the river slowly eroded through limestone layers, carving deeper into the rock. In the 1800s, painter William Turner visited and recorded the geological features of this Alpine formation in his artwork.

The Saint Bruno Bridge serves as a landmark that connects communities and guides walkers crossing the gorge. It shows how people adapted to this natural barrier to maintain daily connections across the canyon.

The gorge is accessible through marked hiking trails starting from the Saint Bruno Bridge parking area, with routes suitable for different fitness levels. Water levels and weather conditions can affect trail difficulty, so wearing sturdy footwear is important for safe footing.

Water in the gorge flows partly from underground networks originating in the Dent de Crolles mountain, which keeps the river flowing despite the name meaning Dead Guiers. This hidden water source explains why the river remains visible and active even during drier periods.