- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 51°40'27"N 3°4'18"W
- Eastings/Northings: 325977, 197818
- OS Grid: ST259978
- Mapcode Local: GBR J2.5Q0V
- Mapcode Global: VH79Y.P5WW
Location and coordinates are for the approximate centre of Mynydd Twyn-glas within this administrative area.
Geographic features and populated places may cross administrative borders.