- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°58'31"N 3°41'50"W
- Eastings/Northings: 283516, 232135
- OS Grid: SN835321
- Mapcode Local: GBR Y8.KPK7
- Mapcode Global: VH5F4.VMR0
Location and coordinates are for the approximate centre of Cwm Rhiwlas within this administrative area.
Geographic features and populated places may cross administrative borders.