- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°41'37"N 3°43'27"W
- Eastings/Northings: 283573, 312079
- OS Grid: SH835120
- Mapcode Local: GBR 97.39QW
- Mapcode Global: WH682.RKS6
Location and coordinates are for the approximate centre of Cwm Du within this administrative area.
Geographic features and populated places may cross administrative borders.