Cloughmore or Cloghmore (from Irish An Chloch Mhór, meaning 'the big stone'), known locally as "The Big Stone", is a huge granite boulder perched on a mountainside almost 1,000 feet (300 m) above the village of Rostrevor, County Down, Northern Ireland. It sits on the slopes of Slieve Martin, overlooking Rostrevor Forest, Carlingford Lough and the Cooley Peninsula.