- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 54°13'53"N 2°6'48"W
- Eastings/Northings: 392708, 481758
- OS Grid: SD927817
- Mapcode Local: GBR FMPH.8W
- Mapcode Global: WHB5V.HWVY
Location and coordinates are for the approximate centre of South Grain Tarn within this administrative area.
Geographic features and populated places may cross administrative borders.