Slieve Croob is the largest of a small group of peaks in the centre of County Down, north of the Mourne Mountains in Northern Ireland. Slieve Croob is near to Dromara and Ballynahinch.
Slieve Croob has been given the conservation designation Area of Outstanding Natural Beauty. The mountain is the source of the River Lagan which starts as a spring and runs from here, through Dromara, Lisburn and Belfast where it enters Belfast Lough, an inlet of the Irish Sea.
Slieve Croob's height and unobstructed views of a wide area have made it a strategic point both in the past and present, a government communications relay station is located on the summit.
