- Category: Geographic Feature
- Type: Cirque or Hollow
- Latitude/Longitude: 53°9'7"N 3°59'33"W
- Eastings/Northings: 266842, 363501
- OS Grid: SH668635
- Mapcode Local: GBR 5W.5GKT
- Mapcode Global: WH54P.M1XF
Location and coordinates are for the approximate centre of Cwmglas Mawr within this administrative area.
Geographic features and populated places may cross administrative borders.