- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°57'33"N 3°44'3"W
- Eastings/Northings: 280925, 230384
- OS Grid: SN809303
- Mapcode Local: GBR Y7.LLBS
- Mapcode Global: VH5FB.704X
Location and coordinates are for the approximate centre of Cwm yr Olchfa within this administrative area.
Geographic features and populated places may cross administrative borders.