- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 52°43'38"N 3°14'31"W
- Eastings/Northings: 316210, 315145
- OS Grid: SJ162151
- Mapcode Local: GBR 9W.18FF
- Mapcode Global: WH798.5PCZ
Location and coordinates are for the approximate centre of Allt y Main within this administrative area.
Geographic features and populated places may cross administrative borders.