Truskmore (Irish: Trosc Mór, meaning 'big cod')[3] is a mountain with a height of 647 metres (2,123 ft) on the border of County Sligo and County Leitrim in Ireland.

[1] It is in the middle of a plateau whose edges are marked by high cliffs,[4] including Benbulbin (526m), Benwiskin (514m), Slievemore (597m) and Kings Mountain (462m).

[4] The Truskmore television transmitter opened on 1 February 1962, the second of the original five main Telefis Éireann transmitters to go on air after Kippure (December 1961).

Since the national shutdown of the analog television networks on 24 October 2012,[5] Truskmore now broadcasts[6] the Irish DTT service Saorview and the national FM radio channels to the northwest of Ireland, including a large area of the west of Northern Ireland.

The site is owned and operated by 2RN, a subsidiary[7] of the Irish public service broadcaster RTÉ.