- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°26'54"N 3°14'27"W
- Eastings/Northings: 313851, 172901
- OS Grid: ST138729
- Mapcode Local: GBR K2Z.8Q
- Mapcode Global: VH6FC.RVXG
Location and coordinates are for the approximate centre of Cwm Penllwynog within this administrative area.
Geographic features and populated places may cross administrative borders.