You need to watch the signs for the correct time of day to cross, as it is so narrow, you only leave either morning or afternoon, depending on which was you go.
The Col d'Aubisque (1,709 m.; Occitan: Còth d'Aubisca) is a mountain pass in the Pyrenees 30 km south of Tarbes and Pau in the department of the Pyrénées-Atlantiques, in the Aquitaine region of France.[1]
The pass is on the northern slopes of the Pic de Ger (2,613m.) and connects Laruns, in the valley of the Gave d'Ossau, via Eaux-Bonnes (west) to Argelès-Gazost, in the valley of the Gave de Pau, via the Col du Soulor (east). The road crosses the Cirque du Litor, in the upper part of the Ouzom valley. It is generally closed from December to June.
http://www.laroutedescols.com/explore.php Part of the Route de Cols from the Atlantic to the Mediterranean