Vallée du Tech The Tech valley stretches for 15 kilometers from Arrens Marsous to Plan d’Aste. View Map It’s a valley well known to hikers, and offers access to the hostels (‘refuges’) of Migouelou, Ledormeur and Larribat. The valley is used for the production of electricity, with the dams of Migouelou and Tech, the technical … Lire la suite TECH VALLEY