- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 52°32'45"N 3°37'51"W
- Eastings/Northings: 289500, 295500
- OS Grid: SN895955
- Mapcode Local: GBR 9C.DNPF
- Mapcode Global: VH5BH.08TH
Location and coordinates are for the approximate centre of Allt Ddu within this administrative area.
Geographic features and populated places may cross administrative borders.