- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 54°51'11"N 3°9'25"W
- Eastings/Northings: 325810, 551558
- OS Grid: NY258515
- Mapcode Local: GBR 6DDB.90
- Mapcode Global: WH6Z1.G8VQ
Location and coordinates are for the approximate centre of Martin Tarn within this administrative area.
Geographic features and populated places may cross administrative borders.