- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 54°12'54"N 3°6'47"W
- Eastings/Northings: 327500, 480500
- OS Grid: SD275805
- Mapcode Local: GBR 6MPP.SR
- Mapcode Global: WH725.49RZ
Location and coordinates are for the approximate centre of Knottallow Tarn within this administrative area.
Geographic features and populated places may cross administrative borders.