- Category: Water Feature
- Type: Island
- Latitude/Longitude: 50°10'42"N 5°37'16"W
- Eastings/Northings: 141566, 37221
- OS Grid: SW415372
- Mapcode Local: GBR DXH6.Q0D
- Mapcode Global: VH052.JS51
Location and coordinates are for the approximate centre of Castle Rock within this administrative area.
Geographic features and populated places may cross administrative borders.