- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°57'31"N 3°31'14"W
- Eastings/Northings: 297947, 341225
- OS Grid: SH979412
- Mapcode Local: GBR 6H.KP80
- Mapcode Global: WH66T.WWNN
Location and coordinates are for the approximate centre of Cwm Main within this administrative area.
Geographic features and populated places may cross administrative borders.