To reach the starting point, drive to the end of the Benasque Valley, following signs for Valle de Estos, and park in the car park (please note, it can fill up quickly).
(S) From the start, follow the GR®11 signposts towards the Estos Mountain Hut.
(1) Ignore the alternative route that climbs up the right-hand side of the mountain and follow the track that runs alongside the river towards the bottom of the Estos Valley.
(2) Ignore the alternative route heading up to the left and follow the track that runs alongside the river towards the bottom of the Estos valley.
(3) Stop off at a small outcrop overlooking the Gorgues Galantes waterfalls. Continue to the next junction.
(4) At the junction, take the path leading uphill to the right (signposted ‘Ruta de los 3 Refugios’) towards the Estos Mountain Hut, which soon comes into view.
(5) Keep straight on at the junction to reach the refuge (E).