- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°38'18"N 3°26'32"W
- Eastings/Northings: 302500, 305500
- OS Grid: SJ025055
- Mapcode Local: GBR 9M.6TBS
- Mapcode Global: WH79K.3Y35
Location and coordinates are for the approximate centre of Llyn Hir within this administrative area.
Geographic features and populated places may cross administrative borders.