Park in the Dwyer-McAllister car park. Go NW along the road around 310m. Use the tracks as shown to bring you out of the forest.
The route to Carrig, the southern spur of Keadeen, is easy and in full sight of a huge view, starting with Brusselstown Ring to the west. On a good day many of the interesting summits of South Wicklow/ North Wexford can be seen here such as Croghan Kinsella/ Annagh Hill/ Muskeagh/ Ballycumber. In the distance you may be able to see the Blackstairs, Comeraghs, Galtees etc.
The route from Carrig goes NE over roughish ground to the East ridge of Keadeen and down to the road. The valley here is wet and mucky however the route shown which takes a 400m SE turn, a NE turn through a burnt out forest and then uses miscellaneous forest tracks minimises the dampness.
You may be able to find a small track to the summit of Keadeen through the fairly passable grass.
Return to the road at the 3-way junction at Ballinfoyle and then a road walk of around 2400m back to the car park.