- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 54°27'19"N 3°19'0"W
- Eastings/Northings: 314728, 507473
- OS Grid: NY147074
- Mapcode Local: GBR 5J8X.QL
- Mapcode Global: WH70X.08VP
Location and coordinates are for the approximate centre of Greendale Tarn within this administrative area.
Geographic features and populated places may cross administrative borders.