You are entering the Néouvielle National Nature Reserve, which is protected by regulations. Please respect these regulations (see practical information).
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At Aragnouet Fabian, leave the Bielsa tunnel road and turn right onto the D 929 Route des Lacs. At the Lac d'Orédon junction, turn right and take the toll road to the Lac d'Aubert terminus (closed from 9:30 a.m., shuttle buses available).
(S/E) From the car park, return along the road to the edge of Lac d'Aumar. Signposted Col d'Estoudou.
(1) Continue either along theGR® 10 or along the road to the end of Lac d'Aumar.
(2) Take the path on the left towards Col d'Aumar. The well-marked path zigzags up to Col d'Aumar (altitude 2,374 metres).
(3) The well-marked trail descends.
(4) At the fork at around 2,330 metres, continue descending due north.
(5) At the Lacs d'Estibère lakes, take the path on the right.
If you miss it, don't worry, the path continues straight on to Lac Supérieur and you will have to go around it on the right. The path reaches the edge of the lake.
(6) Take a small south-east path that leads to a small lake.
Go around it on the left and join Lac de l'Île. Follow it on the left to its end.
Option: from this point, you can make a round trip to Lac de l'Ours by heading south-east.
(7). Cross the stream and climb a little on the hill on the right, being careful not to go down on the left. You will quickly find a well-marked path in the grass that heads roughly south-west to rejoin the path you took on the way up.
(4) Turn left and return to the car park (S/E) via the same route.
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Difficult 
Very difficult 
