- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°17'31"N 3°46'58"W
- Eastings/Northings: 278500, 267500
- OS Grid: SN785675
- Mapcode Local: GBR 95.XM8G
- Mapcode Global: VH5CK.DN06
Location and coordinates are for the approximate centre of Llyn Hir within this administrative area.
Geographic features and populated places may cross administrative borders.