- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 51°36'26"N 3°10'41"W
- Eastings/Northings: 318500, 190500
- OS Grid: ST185905
- Mapcode Local: GBR HY.9TH5
- Mapcode Global: VH6DM.VVMM
Location and coordinates are for the approximate centre of Twyn yr Oerfel within this administrative area.
Geographic features and populated places may cross administrative borders.