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The Lenne in Iserlohn-Letmathe.
Country Germany
Physical characteristics
Main source Sauerland
819 m (2,687 ft)
River mouth Ruhr
51°24′54″N 7°29′31″E / 51.41500°N 7.49194°E / 51.41500; 7.49194Coordinates: 51°24′54″N 7°29′31″E / 51.41500°N 7.49194°E / 51.41500; 7.49194
Length 129.0 km (80.2 mi) [1]
  • Average rate:
    25 m3/s (880 cu ft/s)
Basin features
Progression RuhrRhineNorth Sea
Basin size 1,355 km2 (523 sq mi) [1]

The Lenne is a tributary of the river Ruhr in the Sauerland hills, western Germany. It has caused flooding in recent years.[2]

Having its source on top of the Kahler Asten near Winterberg in an intermittent spring at an elevation of 2,687 ft (819 m), 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.[citation needed]


  1. ^ a b Hydrographic Directory of the NRW State Office for Nature, the Environment and Consumer Protection (Gewässerverzeichnis des Landesamtes für Natur, Umwelt und Verbraucherschutz NRW 2010) (xls; 4.67 MB)
  2. ^ Gôppert, H.; Ihringer, J.; Plate, E. J.; Morgenschweis, G. (April 1998). "Flood forecast model for improved reservoir management in the Lenne River catchment, Germany". Hydrological Sciences—Journal—des Sciences Hydrologiques. Pub. 43 (2): 215. CiteSeerX accessible. doi:10.1080/02626669809492119. 
  • Media related to Lenne at Wikimedia Commons