The Mourne Mountains are a granite mountain range in County Down in the south-east of Northern Ireland. It includes the highest mountains in Northern Ireland and the province of Ulster. The highest of these is Slieve Donard at 850 metres (2,790 ft). The Mournes is an area of outstanding natural beauty and has been proposed as the first national park in Northern Ireland. The area is partly owned by the National Trust and see a large number of visitors every year. The name Mourne (historically spelt Morne) is derived from the name of a Gaelic clann or sept called the Mughdhorna.
The Mournes are visited by many tourists, hillwalkers, cyclists and rock climbers. Following a fundraising drive in 1993, the National Trust purchased nearly 1,300 acres (5.3 km2) of land in the Mournes. This included a part of Slieve Donard and nearby Slieve Commedagh, at 767 metres (2,516 ft) the second-highest mountain in the area.