ApproachThe approach is by car up to the barrier (1.355 m) placed across the forest trail that comes from Nerín (Valle de Vió, Huesca). There are 2 options then:
1. Hike along the forest trail 7 Km up to Cuello Arenas (1.894 m) and option 2.
2. Take the path (NW-N) at the water tank and soon leave to the right the trail that leads to Mondoto (1.962 m). Our path goes NW wards crossing the forest trail (1.620 m aprox) and Barranco (creek) d'a Fueba, then joins the forest trail again at 1.725 m aprox. Just after passing a bridge over Barranco Caldaruelo take the path (NE) to Cuello Arenas (1.894 m), where both trails join (2 h). Cross another barrier to the right and follow the track (N) passing Casa del Puerto to the right. Hike (N-NW) along meadows to Fuente (water source) de las Trubiasas (2.085 m aprox). Push forward NW wards to Cuello Gordo (2.188 m) 3 h 15 min, where we can see Cañón de Ordesa. Then the trail turns right traversing the NW slope of Sierra Custodia. Cross Barranco Arracones and ascent slightly (NW) to Refugio de Góriz (2.160 m) 4 h 30 min.