- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°33'58"N 3°28'9"W
- Eastings/Northings: 300500, 297500
- OS Grid: SO005975
- Mapcode Local: GBR 9L.CDGF
- Mapcode Global: WH68S.PR3K
Location and coordinates are for the approximate centre of Llyn Mawr within this administrative area.
Geographic features and populated places may cross administrative borders.