Nestling in what is locally known as the Middle Glens, (includes Glenariffe, Glenballyeamon, Glencorp and Glenann), Glendun also known as the brown glen, is found 30 miles from Larne, 25 miles from Ballymena and 32 miles from Coleraine. A peaceful glen, it has the largest area of deciduous woodland due mainly to landlords such as the Whites of Broughshane who planted the 71 acres known as Craigagh Wood. The National Trust Village of Cushendun is situated at the mouth of the river Dun and during the seventeenth and eighteenth centuries was an important trading port with Scotland.

A survey of Glendun identified ten clachans - Aughnasillagh (1), Ligadaughtan (2), Ballyteerim (3), White House (4), Ardicoan (5), Drumfresky (6), Callisnagh (7), Dunouragan (8), Gortaghragan (9) and Straid (10).