The Lavedan communicates with the vallée de Campan (vallée de l'Adour) by the col du Tourmalet and with the vallée d'Ossau by the cirque du Litor (east of col d'Aubisque ; the left bank of the vallée de l'Ouzom is part of Ossau while the right bank is part of the val d'Azun). It is separated from the Aragon by the franco-spanish border, traversable by numerous ports.