- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°33'25"N 3°28'8"W
- Eastings/Northings: 300500, 296500
- OS Grid: SO005965
- Mapcode Local: GBR 9L.CSNK
- Mapcode Global: WH68S.PZ8G
Location and coordinates are for the approximate centre of Llyn Du within this administrative area.
Geographic features and populated places may cross administrative borders.