- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 52°21'28"N 3°31'11"W
- Eastings/Northings: 296597, 274400
- OS Grid: SN965744
- Mapcode Local: GBR 9J.SD24
- Mapcode Global: VH5C9.YZ2T
Location and coordinates are for the approximate centre of Pyllau Clais within this administrative area.
Geographic features and populated places may cross administrative borders.