| Lenne | |
| Mouth Coordinates: | 51.415°N 7.4919°W |
| Subdivision Type1: | Country |
| Length: | 129km (80miles) |
| Source1 Elevation: | 819m (2,687feet) |
| Discharge1 Avg: | 25m3/s |
| Basin Size: | 1355km2 |
| Tributaries Right: | Nesselbach (Lenne), Nette (Lenne), Sorpe (Lenne) |
The Lenne is a tributary of the river Ruhr in the Sauerland hills, western Germany. It has caused flooding in recent years.[1]
Having its source on top of the Kahler Asten near Winterberg in an intermittent spring at an elevation of 2687feet, the Lenne ends after a course of 129 km flowing into the Ruhr river near the city of Hagen. With an average discharge of 25 m³/s near its mouth, it is the main tributary of the Ruhr.