- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°8'14"N 4°30'53"W
- Eastings/Northings: 227997, 251760
- OS Grid: SN279517
- Mapcode Local: GBR D5.7JSR
- Mapcode Global: VH2MK.PJLX
Location and coordinates are for the approximate centre of Carreg y Trothwy within this administrative area.
Geographic features and populated places may cross administrative borders.