To the NW of Viladecavalls is the Turó del Ros (Serra de Collcardús), and the cave lies below the hill, on its southern slope and more specifically to the S of the summit.

Access can be gained from Can Boada de les Parentes and currently from the Collcardús tunnel (C-58 road from Terrassa to Vacarisses). The approach from the Collcardús tunnel can be made in a true off-road vehicle (4x4 with low range), following the track that climbs up to the Turó del Ros. A little before reaching it, one must take a path (on foot), to the left, which climbs steeply and descends along the S slope in the direction of Can Boada de les Parentes. One must descend to a fork marked with a cairn (UTM coordinates... X: 411437; Y: 4603220). To the right a small trail starts where red marks are found. Following them one reaches first the cova de les Tres Boques and then the Cova de les Pedres.

Another option, which also starts at Collcardús, is to climb to the Coll de Can Margarit and follow the track that goes around the Serra de Collcardús along its E slope. On reaching a 180º bend, a track begins that comes head-on and goes to Can Boada de les Parentes. Shortly after following it, one must take the first turn-off (it climbs steeply) to the right until reaching the aforementioned cairn. Then follow the red marks. We do not know the state of this track.

On both itineraries one must bear in mind, if travelling by vehicle, that the gate of the restaurant next to the Collcardús tunnel is open.