Hike along the penstock (large water pipes) - Loop walk

A superb combination near Pralognan, an itinerary steeped in history and (hydro)electricity. This route is located on a north-facing slope. In wet weather or after a heavy storm, it can be slippery.

Water flows beneath your feet through an underground gallery... This gallery, which starts at the dam downstream from the hamlet of Les Prioux, runs along the ubac slope, i.e. the shady north side of the mountain, as opposed to the sunny adret side, before crossing under Mont Bochor and Mont Chevrier. The water ends its wild journey at Villard du Planay, where it powers the turbines of a hydroelectric power station. Along the way, discover the various windows of the underground gallery and the remains of the barracks used by the men who completed the tunnels just after the Second World War. Enter the history of hydroelectricity !