(S) Start from the information sign at Lac du Treste.
Walk past the wash house; feel free to walk round the building to get a better view of it.
Walk along a wide track for 3 km, winding your way through poplar groves, oak woods and farmland, heading north-east.
(1) Cross the road leading to Saint-Jean-de-Lier.
(2) Turn left to reach the banks of the Adour. Follow the Saint-Jean-de-Lier fitness trail on your right.
(3) Follow the banks of the Adour, with the agricultural valley of Saint-Jean-de-Lier on your right, until you reach the wooded valley of Vicq-d’Auribat.
(4) Confluence of the Adour and the Midouze.
You’ll arrive at the information sign on the embankment at the junction with the “Route de l’Adour” (E).