- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°51'45"N 3°24'39"W
- Eastings/Northings: 305098, 330396
- OS Grid: SJ050303
- Mapcode Local: GBR 6M.RRX3
- Mapcode Global: WH78L.K9WQ
Location and coordinates are for the approximate centre of Cwm yr Eithin within this administrative area.
Geographic features and populated places may cross administrative borders.