- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°29'53"N 3°35'32"W
- Eastings/Northings: 291999, 290129
- OS Grid: SN919901
- Mapcode Local: GBR 9F.HL66
- Mapcode Global: VH5BP.PG6N
Location and coordinates are for the approximate centre of Cwm Carreg-Ddu within this administrative area.
Geographic features and populated places may cross administrative borders.