On the road between Luz-Saint-Sauveur and the Col du Tourmalet, stop at Barèges. After the double hairpin bend at the entrance to the village, drive about 200 m and on the left, just after the Hubert Reeves school, enter the public car park marked "Résidence de l'Ayré et HLM", just before a large building with wooden superstructures.
(S/E) Follow the Bastan river upstream along the footpath beside the torrent.
(1) At the entrance to the footbridge crossing the stream, a large sign indicates the start ofthe GR® 10 hiking trail and a beginner's drawing trail. Cross the footbridge, then turn left onto theGR® 10.
(2) Ignore the return trail on the right and continue on theGR®. About thirty metres further on, you will see a memorial stone on the right, slightly off the path, in honour of the ALAT soldiers who died in aerial combat. Continue on theGR® overlooking the Bastan valley.
(3) Continue straight ahead to the end of the path, where you will find a campsite and a rocky summit topped by the Croix de Saint-Justin and a small chapel.
(4) After exploring the site and admiring the view, retrace your steps for about 200 m.
(3) Leave theGR® and take the path that climbs slightly to the left (a variant ofthe GR®10) and further on meets a track coming from the opposite direction and descending towards a hamlet below on the right.
(5) Take this track straight ahead, continuing along the path.
(6) In a sharp right-hand bend, the road crosses a stream via a concrete ford. Turn right inside the bend onto the path descending southwards, more or less following the stream. After several long hairpin bends, the path moves away from the stream and crosses another path.
(7) Keep left to return to the stream, which you will soon cross before descending steeply alongside it. You will rejoin the GR®.
(2) Follow it to the left and return to the footbridge over the Bastan.
(1) After crossing the footbridge in the opposite direction, return to the car park by following the path along the stream (S/E).
