After coming over the mountains from Laragh to Glenmalure, turn northwest at the Drumgoff bridge. From there it's about 6km up the road beside the River Avonbeg to a car park where trails lead off in various directions.
You can walk up the hidden Fraughan Rock Glen west of the car park, and – for experienced hill walkers only – continue to the summit of Lugnaquilla (925m; allow six hours for the return trip).
The head of Glenmalure and parts of the neighbouring Glen of Imaal are off-limits. It's military land that's well marked with warning signs.