Baou trouca (Pierced cliff in Provençal) is located below Vallon du Petit Pignet on Les Calanques National Park in Bouches-du-Rhône department of France. The main opening has an estimated height of 17 meters. A second opening is located on sea level and a third one connect the pierced needle to the continent. It is notified as Baou Trouca on special IGN topographic map Les Calanques 1/15000.