• Starting point : Saint-Mamet
  • Total distance : 4,7 km
  • Elevation : 430 m
  • Walking : 2 h. 30 min. Medium
  • Trail : 2 h. Medium

A real natural curiosity, this is a cool, wooded walk. At the end of the Lis valley, on your left, you can see the Portillon hydroelectric power station, built in 1941.
Did you know that the water turbined in this plant comes from the Portillon lake at an altitude of over 2,500m in the neighbouring valley? The water is transported to the turbines via an 8km underground gallery and a penstock (...)

Access the details of this itinerary on Cirkwi.com

Last update : 08/09/2026 à 04:58:26

Source : Cirkwi | Haute-Garonne Tourisme
Photo credit : @Cirkwi