- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°42'47"N 4°2'22"W
- Eastings/Northings: 262311, 314803
- OS Grid: SH623148
- Mapcode Local: GBR 8T.240R
- Mapcode Global: WH56S.X2H7
Location and coordinates are for the approximate centre of Cerig y Gorllwyn within this administrative area.
Geographic features and populated places may cross administrative borders.