- Category: Geographic Feature
- Type: Hill or Mountain
- Latitude/Longitude: 52°45'19"N 3°25'52"W
- Eastings/Northings: 303500, 318500
- OS Grid: SJ035185
- Mapcode Local: GBR 6M.ZDZ2
- Mapcode Global: WH78Z.8Z9Z
Location and coordinates are for the approximate centre of Boncyn Celyn within this administrative area.
Geographic features and populated places may cross administrative borders.