Access: from the A138 road from Biescas to Ainsa at Salinas de Sin, turn left towards San Chuan de Plan, Sin. At km 6.2, turn left onto a small tarmac road towards Sin and Serveto. Beyond Sin, continue on a gravel track, accessible by car, until you reach Sarrau del Clo (5 to 6 km). Leave your car in a bend, taking care not to obstruct traffic or access to the meadows.
(S/E) Follow the track to Sarrau de Pardinas (altitude 2109 m). Turn left at the hairpin bend onto a small path marked by two cairns, which climbs diagonally towards Collado del Plan de Monzarro (2263 m).
Descend towards Plan de Monzarro (reservoir) and head south on a well-marked path that climbs up to Clotez de Monzarro. At an altitude of 2,250 metres, head east on the ridge of Clotez de Monzarro. There is no path and the slope is quite exposed. When you reach a fence, follow it along the valley side and it heads south-south-west towards a basin with a water source.
Continue along the track, which will take you back to a large white sign and the gravel track.