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(S) After spending the night at the refuge (1988 m), we head south along the left side of the lake.
(1) Very quickly, the path climbs steeply, making several hairpin bends.
(2) Arrival at the Col de la Haugade Inférieur (2,311 m). Please note that the pass is on the right as you come out of the hairpin bends of this climb. It is due south. Take the opportunity to enjoy the view and quench your thirst. Descend due south.
(3) Pass the Col de Haugade Supérieur (2,378 m).
(4) Arrive at a fork (2,290 m) on this descending path.
Following a landslide reported in 2022, go straight ahead to reach the small Lac du Pourtet. Pass a spring before reaching a fork.
(5) Continue straight ahead towards Lac du Pourtet.
(6) Arrive at Lac du Pourtet (altitude 2,420 m). The path heads due south. Take care on the tricky section above the lake when there is still some snow. Pass by Lac Nère (2,309 m). Descend, making sure to follow the well-marked path, which has been restored in places.
(7) When you reach a fork (altitude 2043 m), turn right heading due west towards Lacs de Cambalès and Lacs d'Opale (2320 m). After 500 m, a path branches off to the left towards Lacs d'Opale.
(8) You will arrive in the middle of the Lacs d'Opale (2350 m). A mineral landscape unfolds before you. A short rest will do you good. You are not far from the second refuge.
Turn back to the previous fork.
(7) Turn right towards the Refuge Wallon (or Marcadau). The path descends, passing through a forest of mountain pines in places. Pass close to the Gave de Cauterets.
(E) Arrive at the Refuge Wallon (1,865 m). There is a small chapel on the right before you arrive. The landscape around this spot is magnificent. To the south: Col d'Arratille. To the south-west: Port du Marcadau. To the west: Col de La Fache.
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