South West Highway Directions - Langford Park is located on Nettleton Road in Jarrahdale. This is about 45 to 50 minutes drive south from the centre of Perth. You can either go down the South West Highway and turn left onto Nettleton Road just as you leave Byford (Peak petrol station on the corner) and proceed along Nettleton Road until you cross a set of disused train tracks. The entrance to Langford Park will be on your right about 400m after the train line. You will cross the train line again as you enter the park and you should follow the signs at the round about that take you to the lake car park.