- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 52°21'59"N 3°36'25"W
- Eastings/Northings: 290674, 275500
- OS Grid: SN906755
- Mapcode Local: GBR 9D.S2JK
- Mapcode Global: VH5C8.FSF4
Location and coordinates are for the approximate centre of Tan-yr-allt within this administrative area.
Geographic features and populated places may cross administrative borders.