- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°51'7"N 3°23'53"W
- Eastings/Northings: 305952, 329220
- OS Grid: SJ059292
- Mapcode Local: GBR 6N.S921
- Mapcode Global: WH78L.SK1S
Location and coordinates are for the approximate centre of Cwm Main within this administrative area.
Geographic features and populated places may cross administrative borders.