Truskmore is a 647 m (2,123 ft) mountain

Mountain

Image:Himalaya_annotated.jpg|thumb|right|The Himalayan mountain range with Mount Everestrect 58 14 160 49 Chomo Lonzorect 200 28 335 52 Makalurect 378 24 566 45 Mount Everestrect 188 581 920 656 Tibetan Plateaurect 250 406 340 427 Rong River...

 on the border of County Sligo and County Leitrim

County Leitrim

County Leitrim is a county in Ireland. It is located in the West Region and is also part of the province of Connacht. It is named after the village of Leitrim. Leitrim County Council is the local authority for the county...

, Republic of Ireland

Republic of Ireland

Ireland , described as the Republic of Ireland , is a sovereign state in Europe occupying approximately five-sixths of the island of the same name. Its capital is Dublin. Ireland, which had a population of 4.58 million in 2011, is a constitutional republic governed as a parliamentary democracy,...

. It is the highest peak of the Dartry Mountains

Dartry Mountains

The Dartry Mountains are a range in the north west of Ireland.They are situated mainly on the border of County Sligo and County Leitrim....

 and the highest in County Sligo.

Truskmore is the highest point on a large plateau

Plateau

In geology and earth science, a plateau , also called a high plain or tableland, is an area of highland, usually consisting of relatively flat terrain. A highly eroded plateau is called a dissected plateau...

 stretching across northeast Sligo and northwest Leitrim. The edges of this plateau is marked by high cliff

Cliff

In geography and geology, a cliff is a significant vertical, or near vertical, rock exposure. Cliffs are formed as erosion landforms due to the processes of erosion and weathering that produce them. Cliffs are common on coasts, in mountainous areas, escarpments and along rivers. Cliffs are usually...

s—these include Benbulbin (526m), Benwiskin (514m), Slievemore (597m) and Kings Mountain (462m).

The peak of Truskmore is in County Sligo, a short distance from the border with County Leitrim. However, the mountain itself is within both counties.