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Lac du Tech walks
Lake Auseilla from the Tech Dam
Visorando member 
13.46 km
+1,006 m
-1,006 m
6h 45
Moderate
Departure from Arrens-Marsous (Hautes-Pyrénées)
Pretty lakes at the bottom of a little-visited cirque (altitude 2,192 m) in the pretty valley of the Ruisseau de Labas.Marmots, chamois and vultures are often seen in the Bouleste valley.Please note: in spring, when the snow melts, it is sometimes impossible to cross the Ruisseau de Labas at the WPT (3).
Walks near Lac du Tech
Pont d'Espagne - Bayssellance Refuge
Visorando member 11.36 km
+1,264 m
-85 m
6h 50
Difficult
Departure from Cauterets (Hautes-Pyrénées)
Approach walk starting from Pont d'Espagne, passing by the magnificent Lac de Gaube, the Oulettes de Gaube and the refuge of the same name. The stage continues with a steeper climb to the Lacs d'Arraillé, then the Hourquette d'Ossoue pass before descending to the Refuge de Bayssellance.
Lac de Gaube - Cabane des Tousaus
Visorando member 
22.34 km
+1,204 m
-1,109 m
9h 50
Difficult
Departure from Cauterets (Hautes-Pyrénées)
Second stage of the four-day adventure from Cauterets to Luz-Saint-Sauveur via Petit Vignemale and Gavarnie. It can be done in one day, but I think it would be more enjoyable to split it into two days to take the time to appreciate the magnificent scenery!