- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 53°4'37"N 3°39'54"W
- Eastings/Northings: 288550, 354618
- OS Grid: SH885546
- Mapcode Local: GBR 69.B46D
- Mapcode Global: WH665.NXWD
Location and coordinates are for the approximate centre of Bryniau Duon within this administrative area.
Geographic features and populated places may cross administrative borders.