- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 51°58'47"N 4°26'41"W
- Eastings/Northings: 232185, 234086
- OS Grid: SN321340
- Mapcode Local: GBR D8.KJ3L
- Mapcode Global: VH3KT.XH0M
Location and coordinates are for the approximate centre of Grugygorllwyn within this administrative area.
Geographic features and populated places may cross administrative borders.