Here is the google maps location for the parking, use in combination with the directions below: goo.gl/maps/MEm9hCJ2qmYjgETHA
Drive towards Sant Andreu De La Barca via the town of Palleja. At the entrance to the town there is a roundabout with a large 'Sant Andreu De La Barca' sign. At the roundabout turn left (3rd exit), pass over a bridge that goes over the train tracks and just after you'll come up to a school on your left. Turn left after the school. Continue along this road passing through the small Urbanización Soleia. Eventually you will reach a triangle turn formation on your right. Turn up the road to the right at the triangle. Follow this road (5-10 minutes) until you reach the small climbing parking area on the right side of the road (you will see walls on the right and left side of the road). If you get lost, rely on the google map pin.