At the Cap de Lourbu curve, and under the house, turn right onto a narrow path between the boxwoods. It describes a technical passage under a power line (bike on the shoulder in a rocky area) and then you will need the electric assistance for some climbs. Exit to a path; continue to the left for 50 m until a sharp bend, then go up to the right 80 m along a new path. Leave it at the first bend and go straight to the edge of the forest, where you have to fork completely to the left into a single lane in the grass. Find the track, follow it for 250 m, and then take a new path to the right in the forest that descends to the Gave d'Aspe (red and white markings).