Ounasjoki
The Ounasjoki 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 in length, and the catchment area is, 27% of the Kemijoki catchment area.
Course
The Ounasjoki originates at Ounasjärvi lake in Enontekiö. It flows first eastwards through Periläjärvi lake and turns south after some seven kilometres. The river then follows southern-southeasterly course until its confluence with the Kemijoki at Rovaniemi.Tributaries
Left
- Näkkäläjoki
- Käkkälöjoki
- Syvä Tepastojoki
- Loukinen
- Meltausjoki
Right
- Marrasjoki