- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°25'53"N 3°16'8"W
- Eastings/Northings: 313811, 282270
- OS Grid: SO138822
- Mapcode Local: GBR 9V.MV3D
- Mapcode Global: VH68Q.943R
Location and coordinates are for the approximate centre of Cwm Blethan within this administrative area.
Geographic features and populated places may cross administrative borders.