- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 52°7'13"N 4°20'44"W
- Eastings/Northings: 239500, 249500
- OS Grid: SN395495
- Mapcode Local: GBR DD.8JQX
- Mapcode Global: VH3K3.MYGV
Location and coordinates are for the approximate centre of Allt Ddu within this administrative area.
Geographic features and populated places may cross administrative borders.