Upper Lough SkeaghUpper Lough Skeagh is a freshwater lake in the northeast of Ireland. It is located in County Cavan in the catchment of the River Boyne.GeographyUpper Lough Skeagh measures about long north–south and wide. It is located about northwest of Bailieborough.Natural historyFish species in Upper Lough Skeagh include roach, perch, bream, pike, and the critically endangered European eel. The lake is also a public water supply.