description Kemijoki River Overview
The Kemijoki is Finland's longest river, extending about 550 kilometres from northern Lapland to the Gulf of Bothnia near the city of Kemi. Its drainage basin covers much of Finnish Lapland and receives water from numerous tributaries. The river has been extensively developed for hydroelectric power, with a chain of dams and generating stations that significantly altered its natural flow and migratory fish habitats.
help Kemijoki River FAQ
Why is the Kemijoki called Finland's longest river?
The Kemijoki runs for about 550 kilometres through Finnish Lapland, making it Finland's longest river. It reaches the Gulf of Bothnia near the city of Kemi. [Visit Kemi river guide](https://visitkemi.fi/en/kohde/river-kemijoki/)
Which towns does the Kemijoki pass?
The river passes through or near Kemijärvi and Rovaniemi before reaching Kemi. Rovaniemi is a major city on the river and an important centre in Finnish Lapland. [Kemijoki overview](https://en.wikipedia.org/wiki/Kemijoki)
Why has the Kemijoki been developed for hydropower?
The river has been regulated with numerous hydroelectric facilities. The first hydroelectric plant on the Kemijoki was built at Isohaara in 1949. [Kemijoki overview](https://en.wikipedia.org/wiki/Kemijoki)
Which major tributary joins the Kemijoki at Rovaniemi?
The Ounasjoki joins the Kemijoki at Rovaniemi. This tributary is itself a major Lapland river and adds water from the northern drainage basin. [Kemijoki overview](https://en.wikipedia.org/wiki/Kemijoki)
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