- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 52°51'12"N 3°29'38"W
- Eastings/Northings: 299500, 329500
- OS Grid: SH995295
- Mapcode Local: GBR 6J.S9RH
- Mapcode Global: WH67F.9JGQ
Location and coordinates are for the approximate centre of Y Groes Fagl within this administrative area.
Geographic features and populated places may cross administrative borders.