- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 52°9'55"N 3°55'23"W
- Eastings/Northings: 268554, 253646
- OS Grid: SN685536
- Mapcode Local: GBR DZ.5MJ4
- Mapcode Global: VH4GL.YT8W
Location and coordinates are for the approximate centre of Gnwch Mawr within this administrative area.
Geographic features and populated places may cross administrative borders.