Lough Scur is a freshwater lake in south County Leitrim.
It is part of the Shannon–Erne Waterway. There has been human settlements here since the New Stone Age.
Modern features include quays and moorings. Protected features are Castle John, three Crannogs, and the causeway into Rusheen Island, though “Jail Island” is not protected.
The ecology of Lough Scur, and indeed all county Leitrim lakes, is threatened by pollution and invasive species such as curly waterweed, zebra mussel, and freshwater clam.
This lake is located 1km northwest of the village of Keshcarrigan and is the summit level of the Shannon Erne navigation. It covers an area of 114 hectares, is shallow in nature with depths to 5m. This popular coarse fishing venue contains a good stock of skimmer bream and produces good catches of small to medium sized pike on a regular basis. Pike in excess of 20lbs have also been recorded from this water.
There are extensive areas of fishable bank on the Keshcarrigan and Driney shores and car parking is provided in both areas. A car park and boat slipway are located at Drumcong along the main Ballinamore to Carrick on Shannon road (R208) and boats can also be launched at the Waterways Ireland mooring in the village of Keshcarrigan.