The River Nore (Irish: An Fheoir) is a 140-kilometre (87 mi) long river located in south-east of Ireland. Along with the River Suir and River Barrow, it is one of the constituent rivers of the group known as the Three Sisters. The river drains approximately 977 square miles (2,530 km²) of Leinster. The long term average flow rate of the River Nore is 42.9 Cubic Metres per second (m³/s) The river rises in the Devil's Bit Mountain, County Tipperary.