The Black Mountain transmitting station is a broadcasting and telecommunications facility, situated on Black Mountain to the west of the city of Belfast, on land 301 metres (988 ft) above Ordnance Datum (mean sea level) in Northern Ireland (grid reference J278727).

It includes a guyed steel lattice mast which is 228.6 metres (750 ft) [1] in height.

The height of the top of the structure above mean sea level is 529 metres (1,736 ft).

[1] For high power transmissions of Cool FM, and formerly analogue Channel 5, coverage includes most of central and eastern Ulster, north as far as Ballymena, south as far as Downpatrick and Newry, and west past Dungannon and Cookstown.

Radio stations Q Radio and U105 have a more restricted coverage area, including areas around Greater Belfast, up to Carrickfergus, Antrim, and the shore of Lough Neagh.