This fort is found in the western head of the island in the townland of Eoghanacht south of the village of Sruthán. It consists of a circular single two terraced wall of an impressive height. There are the remains of several Clocháin(stone houses) inside. The fort takes its name from the Eoghanacht tribe of Munster who were associated with the island in Medieval times. Exact dates are not known but it is probably Iron Age.