- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 52°49'23"N 4°41'31"W
- Eastings/Northings: 218705, 328473
- OS Grid: SH187284
- Mapcode Local: GBR GPS7.HGC
- Mapcode Global: WH33M.W9VH
Location and coordinates are for the approximate centre of Mynydd Ystum within this administrative area.
Geographic features and populated places may cross administrative borders.