- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 51°43'8"N 3°47'4"W
- Eastings/Northings: 276820, 203768
- OS Grid: SN768037
- Mapcode Local: GBR H3.2YKG
- Mapcode Global: VH5GG.C12Z
Location and coordinates are for the approximate centre of Mynydd Marchywel within this administrative area.
Geographic features and populated places may cross administrative borders.