- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°42'13"N 3°55'4"W
- Eastings/Northings: 270500, 313500
- OS Grid: SH705135
- Mapcode Local: GBR 8Z.2PZJ
- Mapcode Global: WH56V.S9GN
Location and coordinates are for the approximate centre of Llyn y Gadair within this administrative area.
Geographic features and populated places may cross administrative borders.