Lough Nacung Upper
| Lough Nacung Upper | |
|---|---|
| Loch na Cuinge Uachtarach (Irish) | |
View towards Lough Nacung Upper, with Errigal to the left. | |
| Location | County Donegal |
| Coordinates | 55°01′55″N 8°09′58″W / 55.032°N 8.166°W |
| Lake type | natural freshwater lake |
| Primary inflows | Lough Dunlewey |
| Primary outflows | Lough Nacung Lower, to the Clady River |
| Catchment area | 78.62 km2 (30.36 sq mi) |
| Basin countries | Ireland |
| Max. length | 2.72 miles (4.38 km) |
| Max. width | 0.38 miles (0.61 km) |
| Surface area | 2.08 km2 (0.80 sq mi) |
| Surface elevation | 59 m (194 ft) |
| References | |
![](https://en.wikipedia.org/wiki/File:Donegal,_"Stones,_Peat_And_Rushes_At_Gweedore"_-_geograph.org.uk_-_1140411.jpg){kind=link}
Lough Nacung Upper (Irish: Loch na Cuinge Uachtarach, meaning 'upper narrowness lake' or 'upper lake of the isthmus'), 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)".