Start: Leaving the Bielsa Tunnel, head for Ainsa. Then take the Tella road and, after Cortalaviña, turn right at the fork. Park on the last bend leading to Révilla.
Waymarkers: This hike is very well signposted, with signs at all intersections.
(S/E) At the bend, find a signposted path (Miradores 45min). Follow it to the Ermita de San Lorenzo.
(1) Stop and take a look at this mysterious place. The rock is covered with inscriptions. Just beyond the Ermita de San Lorenzo, there's a first viewpoint with a superb view of the Rio Yaga. Continue on and reach a path junction.
(2) Take the path opposite to reach two superb viewpoints offering exceptional panoramic views of the Escuain Gorge. With binoculars, there's a good chance of spotting vultures.
(3) Turn around and return to the previous path junction.
(2) Turn left and begin a gentle but steep climb. Then the path becomes flat again, follow the cairns and reach the path junction at La Loresa.
(4) Turn right towards Revilla on an almost level path. After a hairpin bend to the right, you reach the hamlet of Revilla.
(5) Continue along this road and return to the car park at the bend (S/E).