Gudenå

The Gudenå or Gudenåen, is Denmark's longest river and runs through the central parts of the Jutlandic peninsula. An anglicized version of the name often seen is 'The River Guden'.

The Gudenåen has its spring in Tinnet Krat, Vejle Municipality and flows a total of 149 kilometres to Randers Fjord in Randers, on a northward course which takes it through the central parts of Jutland. On its way, the river traverses the relatively high lying region of Søhøjlandet, through the lakes of Naldal Sø, Vestbirk Sø, Mossø, Gudensø, Rye Mølle Sø, Birksø, Julsø, Borre Sø, Brassø, Silkeborg Langsø and Sminge Sø before it empties in Randers Fjord; a long inlet of the Kattegat sea. It is fed by numerous streams and wetlands along the way.