Ounasjoki
The 883rd longest river in the world
The Ounasjoki (Northern Sami: Ovnnesjohka) is the Kemijoki's largest tributary and is Finland's longest single river tributary. It is also the largest river entirely within its borders. Ounasjoki is approximately 299.6 kilometres (186.2 mi) in length, and the catchment area is 13,968 square kilometres (5, 393 sq mi), 27% of the Kemijoki catchment area.
Flows through: Finland.
River data from Wikidata (CC0); lengths normalised to a common unit.