- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°56'16"N 3°53'1"W
- Eastings/Northings: 273500, 339500
- OS Grid: SH735395
- Mapcode Local: GBR 60.LYYD
- Mapcode Global: WH55Q.9FV1
Location and coordinates are for the approximate centre of Llyn y Graig-wen within this administrative area.
Geographic features and populated places may cross administrative borders.