Mount Sandel Fort is an Iron Age fort in Coleraine, County Londonderry, Northern Ireland. The remains of the fort are located close to the Mount Sandel Mesolithic site. Mount Sandel Fort mound is a State Care Historic Monument in the townland of Mount Sandel, in Coleraine Borough Council area, at Grid Ref: C8530 3070. 12th century The fort was used as a residence of John de Courcy. See also Mount Sandel Mesolithic site References Archaeological sites in County Londonderry Coleraine Former populated places in Northern Ireland Northern Ireland Environment Agency properties Military history of County Londonderry