- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 54°12'44"N 3°7'4"W
- Eastings/Northings: 327187, 480207
- OS Grid: SD271802
- Mapcode Local: GBR 6MNQ.RQ
- Mapcode Global: WH725.2DH1
Location and coordinates are for the approximate centre of Knottallow Tarn within this administrative area.
Geographic features and populated places may cross administrative borders.