Black Mountain is a large hill which overlooks the city of Belfast, Northern Ireland.

[2] Black Mountain transmitting station is on the summit.

Black Mountain is composed of basalt with limestone underneath,[3] as is Cavehill further north.

There have been flint finds in the area, which also contains raths, deserted farms and overgrown paths joining the fields and homesteads and trails scattered over the mountain.

[5] The quarry is steep and deeply excavated and the basalt from it is used mostly for road stone.