- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°44'48"N 3°42'34"W
- Eastings/Northings: 284701, 317939
- OS Grid: SH847179
- Mapcode Local: GBR 98.01B0
- Mapcode Global: WH67W.Z7Q4
Location and coordinates are for the approximate centre of Cwm yr Ychen within this administrative area.
Geographic features and populated places may cross administrative borders.