- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°50'50"N 3°26'21"W
- Eastings/Northings: 303157, 328747
- OS Grid: SJ031287
- Mapcode Local: GBR 6L.SR0G
- Mapcode Global: WH78L.4PFD
Location and coordinates are for the approximate centre of Cwm Rhiweirth within this administrative area.
Geographic features and populated places may cross administrative borders.