- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 51°38'14"N 2°49'56"W
- Eastings/Northings: 342500, 193500
- OS Grid: ST425935
- Mapcode Local: GBR JD.8493
- Mapcode Global: VH7B8.V3KM
Location and coordinates are for the approximate centre of Mynydd Alltir-fach within this administrative area.
Geographic features and populated places may cross administrative borders.