Lough Nacung Upper

Lough Nacung Upper, also known as Upper Lough Nacung, is a lake in Gweedore, a district in the north-west of County Donegal, Ireland. It connects Lough Dunlewey to Lough Nacung Lower, which drains into the Clady River. Lough Nacung is a Special Area of Conservation.

The name is derived from the Irish cuing, meaning "lake of the isthmus" or "narrow neck of land (as between two lakes)".

Wildlife
The main fish species are sea trout and salmon.