Follow your preferred route to Banbridge and then Rathfriland. On entering Rathfriland, turn left onto Main Street (A25) and continue to follow A25, turning right on to Downpatrick Street and passing (if you're able) Graham's Ice Cream and the bus station, to edge of Rathfriland where you should take a right turn onto Hilltown Road. Follow this into Hilltown where you should turn left in front of the former church onto the Castlewellan Road (B8). As you leave Hilltown, turn right onto Kilkeel Road (B27) and follow this until you come to the Spelga Dam (BT34 5XL). There are facilities at Spelga but they are usually shut when we arrive - it's best to use facilities at Hilltown - they are to the left of the church as you enter the village.
Drive on past Spelga aand turn right at the T junction towards Kilkeel - on B27, Moyad Road. After About one mile further on there is a road to the right which "disappears" into the reservoir. You can park along this road if approaching Pigeon Rock from the north or climbing Muck.
One mile further towards Kilkeel (OS grid ref.: J 269 235) there is a gated entrance to the right which gives access to an informal gravel parking area beside White Water river. From here you can cross the river and climb to the the southern end of Pigeon Rock and/or to Slievemageogh.