At the Errekaldea junction (159m), turn left and immediately right, to climb the rocky path that runs along the foot of the pylon. Slow down and climb straight up to the small cliffs. At the base of the Rocher des Perdrix, the path branches off to the left to pass by a viewpoint indicator (290m). Walk flat for 50m, then choose the path that climbs to the right. You can soon avoid a rocky steepness of the GR10 by a grassy path. Higher up, the very panoramic climb continues between ferns and gorse. The path joins another track coming from the left: continue straight up the Xoldo ascent on easier slopes now.