Rocher Troue is located at the base of the cliff of Causse Noir above "Gorges de la Dourbie" and close to the hamlet of "Massebiau". The arch can be reach from this small village using IGN topographic map 2641 west "Millau" as guide but there is no trail to get to the natural window. The arch is named but not spoted on the aformentionned map (pleat C2).