Tollymore Forest Park is located at Bryansford, near the town of Newcastle in the Mourne and Slieve Croob Area of Outstanding Natural Beauty.
It covers an area of 630 hectares (1,600 acres) at the foot of the Mourne Mountains and has views of the surrounding mountains and the sea at nearby Newcastle.
The Shimna River flows through the park where it is crossed by 16 bridges, the earliest dating to 1726. The river is a spawning ground for salmon and trout and is an Area of Special Scientific Interest due to its geology, flora and fauna. The forest has four walking trails signposted by different coloured arrows, the longest being the "long haul trail" at 8 miles (13 km) long. The Forest Park has been managed by the Forest Service since they purchased it from the Roden Estate in 1941.
A walk along the Shimna river is marked by many curiosities, natural and artificial - rocky outcrops, bridges, grottos and caves. Elsewhere in the park the tree lover can examine experimental forest plots - some of exotic trees such as monkey puzzle and eucalyptus - or admire the tall giant redwoods and Monterey pines.
Oak wood from Tollymore was the preferred material for the interiors of the White Star liners including the 'Titanic' which was built in Belfast. Seek out the original tree of the slow-growing spruce, Picea abies 'Clanbrassiliana' which originated nearby in about 1750 and is the oldest tree in any arboretum in Ireland. A magnificent avenue of Deodar cedars is a striking feature of the entrance to this romantic forest park in the foothills of the Mourne Mountains.