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From Lannemezan, head towards Arreau and the Bielsa tunnel. At Guchen, turn right towards Aulon.
Before reaching the village, turn left towards Granges de Lurgues. At the end of the road, park in the car park (altitude 1409).
(S/E) At the car park, a sign indicates the start of the Cabane d'Auloueilh and Arbizon trails. The path climbs to the right in a north-westerly direction and reaches a ford (elevation 1553).
A few metres further on, you will reach the path that leads to the summit of Arbizon.
(1) Leave it on your right and continue climbing gently to the left, northwest, until you reach a second ford, which can be more difficult to cross at the beginning of the season.
(2) The slope becomes steeper as you reach Lavedan, which you will follow to the Cabane d'Auloueilh.
After an hour and a half of climbing, this is a nice place to take a short break.
(3) From the hut, you can clearly see the path you will need to climb to the south.
Cross the stream and follow the well-marked grassy path south-east to the Crête de Pène d'Ariélère.
(4) Take the path that branches off to the far right, heading south then south-east.
(5) The path veers southwest and descends rapidly to the bottom of the ravine. Reach the right bank of the Ruisseau de Rabat and veer southeast to reach the Cabane du Cap Détestés, which can be seen below.
(6) On the other side of the hut, cross the mountain pastures to join a clearly visible path that heads north-east, approaching the Ruisseau de Rabat.
(7) Cross the stream and pass to the left of the Cabane de Coussitirou. A little further on, cross to the right bank of the stream and walk along the forest to finally reach a track.
(8) Walk along the stream and cross back to the left bank.
(9) Cross the Lavedan and return to the car park (S/E).
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