[RWD version 1 ] Start from the car park at the bottom of Banagher Glen Nature Reserve which is signposted from the B74 Dungiven to Feeny road. Pass through the kissing gate and continue past the old filter house as the road climbs up through the ancient woodland of Banagher Glen.

Continue to a fork in the road take the left fork that is signed for the dam and continue past an interpretative board on a bridge. Legend has it that a large snake escaped from St. Patrick and hid in the gorge under the bridge, where it still remains. The road climbs steeply on up the glen. Take care on the right-hand side as there is a steep drop and no fence or barrier.

Ignore all other tracks leading off until Altnaheglish Dam and Reservoir comes into view Take a rough gravel lane and turn right towards the entrance of Banagher Forest, cross the stile and follow the path along the edge of the reservoir for about 2km.

Take a sharp right turn to cross the Altnaheglish River and then another turn right. The path begins to climb through the trees before turning sharply to the left, right and then left again. The track then climbs the summit of Altnaheglish Hill providing views of Sawel, Dart and Mullaghclogha and towards Donegal on the drop down the other side. Eventually the track comes to a T-junction where you have two choices. Turn right to shorten your walk by taking the high path that meets the Glenedra Water further downstream or turn left as I did in this case and descend through the forest before crossing Glenedra Water or Crooked Burn. Follow this track downstream for 4km as it meanders along the riverbank, eventually you meet the junction with the tarred road. Turn left and return to car park.

My Garmin GPS has an annoying habit of switching itself off, which it did today shortly after the beginning of the walk until I discovered the problem when I arrived at the Altnahegish dam. When this happens it unfortunately messes up some of the stats. The actual start / finish point for this walk is C670 051