Start : The route begins in the Silent Valley Mountain Park main car park reached through the gates on the Head Road on the south side of the Mournes. (BT34 4PU)
Stone way-markers are in place to help guide you. Follow the blue arrows for the Challenge Trail.
(S/E) From the main car park, follow the sign for the Nature Trail until you reach a fork. Take the trail to the right-hand side (North-East), crossing the bridge over the Kilkeel River.
When you come to a sign for Watertown, take the steps up onto the road and turn left, continuing until you reach a junction. At this point you can see the concrete footings of some of the Watertown Houses (this temporary settlement was constructed in 1923 to accommodate the dam builders).
(1) Follow the stone way-markers North which lead you initially to the left and then right, as you climb the slope up to the Mourne Wall. (A)
(2) After 930m or so, the Challenge Trail veers off to the right (South-East) in the direction of the Silent Valley reservoir. Enjoy the views across the dam from the viewpoint area. Follow the trail, making your way downhill again towards the reservoir embankment where your turn right (South).
(3) Then, the way-markers guide you through the woodland area to the left (South-East), past Sally Lough on your left-hand side, and back to the main car park after crossing the Kilkeel River again. (S/E)