Yenisei River, Asia (5,539 km)

Top 5 in Top 10 Longest rivers of the planet.

Yenisei is one of the largest river systems that pour out into the Arctic Ocean. Originating from Mongolia, flowing through Russia, where 97% of the river's water flow flows through the Russian territory and only 3% of the remaining traffic flows through Mongolia, and its currents pour into the Kara sea. This is also the largest river system flowing into the Arctic Ocean.