- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 51°57'22"N 4°43'34"W
- Eastings/Northings: 212773, 232143
- OS Grid: SN127321
- Mapcode Local: GBR CX.LSFS
- Mapcode Global: VH2NF.1396
Location and coordinates are for the approximate centre of Carn Siân within this administrative area.
Geographic features and populated places may cross administrative borders.