- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°1'6"N 4°44'27"W
- Eastings/Northings: 212016, 239115
- OS Grid: SN120391
- Mapcode Local: GBR CW.GW54
- Mapcode Global: VH2N0.RJZG
Location and coordinates are for the approximate centre of Cwm yr Allt-Lwyd within this administrative area.
Geographic features and populated places may cross administrative borders.