- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 52°47'56"N 3°33'4"W
- Eastings/Northings: 295500, 323500
- OS Grid: SH955235
- Mapcode Local: GBR 6G.WMSY
- Mapcode Global: WH67L.FX35
Location and coordinates are for the approximate centre of Allt yr Eryr within this administrative area.
Geographic features and populated places may cross administrative borders.