From km. 13.5 on the road from Terrassa to Mura you must go down along a path towards the Roure Escorçoner, as if heading to the avenc de la Canal de les Teixoneres, but we must follow the riera de les Arenes downstream towards the Sot de la Bota and follow the path that climbs to the coll Prunera. Once here you must follow the ridge eastwards to reach the Morral d'en Bens and, just as we begin to climb up the rocky slope, you must turn right to look for a rocky platform from which we will be able to see la roca foradada below us. Going down along the right-hand side between some holm oaks we will be able to reach it.