- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 52°7'21"N 4°21'5"W
- Eastings/Northings: 239118, 249760
- OS Grid: SN391497
- Mapcode Local: GBR DD.8H8Y
- Mapcode Global: VH3K3.JXF3
Location and coordinates are for the approximate centre of Allt Ddu within this administrative area.
Geographic features and populated places may cross administrative borders.