This fort is situated on the cliffs at Cill Éinne, (Killeany )Inis Mór. Some visitors enjoy the solitude of it in contrast with the busyness of Dún Aonghasa. The fort consists of a terraced wall surrounding the remains of some early dwelling houses known as Clocháns( stone houses). Excavations have not been out carried yet so exact dates cannot be given but it is thought to be possibly contemporary with Dún Aonghasa. It is understood that the name the Black Fort comes from the dark coloured limestone which is characteristic of this particular area on the island.