- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°43'36"N 3°36'51"W
- Eastings/Northings: 291074, 315585
- OS Grid: SH910155
- Mapcode Local: GBR 9D.16RH
- Mapcode Global: WH67Y.GQ2C
Location and coordinates are for the approximate centre of Cwm Lloi within this administrative area.
Geographic features and populated places may cross administrative borders.