- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 53°5'18"N 4°4'39"W
- Eastings/Northings: 260962, 356605
- OS Grid: SH609566
- Mapcode Local: GBR 5R.9KYY
- Mapcode Global: WH54V.BMJN
Location and coordinates are for the approximate centre of Cwm Glas Bach within this administrative area.
Geographic features and populated places may cross administrative borders.