- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 52°8'47"N 3°13'18"W
- Eastings/Northings: 316500, 250500
- OS Grid: SO165505
- Mapcode Local: GBR YX.6TS1
- Mapcode Global: VH6B3.39PW
Location and coordinates are for the approximate centre of Allt Dderw within this administrative area.
Geographic features and populated places may cross administrative borders.