From Mont-ral we will follow the camí de la Foradada that passes through the Serrat de l'Avenc. Once past the avenc de l'Os, further on we will find on the right a small path (ETRS89 X:339688; Y:4572438). We will follow this small path for 250 metres; at this point, on the left of the path, we will find a depression in the terrain where, inside and close to the foot of the cliff, is the avenc de la Pipa. Right at the end of this depression, on the left, we find a small path that climbs between the pit and the wall of the cliff; we will soon reach a large crevice and, just before entering it, on the right we find the small cave.