The Lenne () is a tributary of the river

Ruhr The Ruhr ( ; , also ''Ruhrpott'' ), also referred to as the Ruhr Area, sometimes Ruhr District, Ruhr Region, or Ruhr Valley, is a polycentric urban area in North Rhine-Westphalia, Germany. With a population density of 1,160/km2 and a populati ...

in the

Sauerland The Sauerland () is a rural, hilly area spreading across most of the south-eastern part of the States of Germany, German federal state of North Rhine-Westphalia, in parts heavily forested and, apart from the major valleys, sparsely inhabited. ...

hills, western

Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...

. It has caused flooding in recent years. Having its source on top of the ''

Kahler Asten The Kahler Asten () is an 841.9-metre-high mountain in the Rothaar Mountains, Rothaar range in the district of Hochsauerlandkreis, Hochsauerland, in the German state of North Rhine-Westphalia. It is a popular destination, receiving more than 500, ...

'' near

Winterberg Winterberg (; Westphalian: ''Winnenmerg'') is a town in the Hochsauerland district of North Rhine-Westphalia, central Germany and a major winter sport resort of the Wintersport Arena Sauerland. Geography Winterberg is located in the middle ...

in an intermittent spring at an elevation of , the Lenne ends after a course of 129 km flowing into the

river near the city of

Hagen Hagen () is a city in the States of Germany, state of North Rhine-Westphalia, in western Germany, on the southeastern edge of the Ruhr area, 15 km south of Dortmund, where the rivers Lenne and Volme meet the Ruhr (river), Ruhr. In 2023, the ...

. With an average discharge of 25 m³/s near its mouth, it is the main tributary of the

References

* Rivers of North Rhine-Westphalia Rivers of Germany {{NorthRhineWestphalia-river-stub