This 16-sq-km forest park unfolds 1km east of Rostrevor. From the car park at the top of the forest drive, a 10-minute hike leads up to a superb view over the lough to Carlingford Mountain, as well as to the Cloughmore Stone , a 30-tonne granite boulder inscribed with Victorian-era graffiti. The park is also home to Northern Ireland's best downhill mountain-bike trails ; bike hire and uplift are available from East Coast Adventure , at the trailhead.