- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°55'53"N 3°43'11"W
- Eastings/Northings: 284500, 338500
- OS Grid: SH845385
- Mapcode Local: GBR 67.M8XC
- Mapcode Global: WH66X.TLV1
Location and coordinates are for the approximate centre of Llyn Arenig Fawr within this administrative area.
Geographic features and populated places may cross administrative borders.