Slieve Carr, also known as Slieve Cor or Corslieve, is a mountain with a height of 721 metres in County Mayo, Ireland. It is part of the Nephin Range and is beside Nephin Beg. The mountain is in Wild Nephin National Park and it is the most remote point of land on the Irish mainland. Slieve Carr is a long mountain running north–south, with several small lakes on its eastern slopes.