Oulujoki

Oulujoki, (in modern Finnish literally "Oulu River", originally in old Northern Ostrobothnian dialect literally "Flood River", is a river in Oulu province, Finland.
Its origin is Oulujärvi and its watershed area covers a significant part of Kainuu region.
It flows into the Bothnian Bay at Oulu. Port of Oulu is located at the mouth of the river.