Plizio Visual Lab
Oulujoki
The Oulujoki is one of Northern Finland's most significant rivers, spanning 107 kilometers from Lake Oulujärvi to the Gulf of Bothnia at the city of Oulu. Historically, the river was the primary route for transporting pine tar, which was once Finland's most valuable export. Famous tar boats navigated through dangerous rapids to bring this 'black gold' to the port of Oulu. During the 20th century, the river was heavily transformed by the construction of several hydroelectric power plants, including Merikoski and Pyhäkoski, to secure energy for Finland's reconstruction. These power plants are architecturally notable and define the modern landscape. Despite regulation, the Oulujoki remains a vital ecosystem and has recreational spaces for the urban population. It is also known for its migratory fish stocks, though these require support from fish ladders and stocking programs. The river's mouth in Oulu serves as a central meeting point with public parks and cultural facilities.
Best time to visit & climate
The most pleasant time to visit is Jun–Aug.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | -10 | -10 | -6 | 1 | 8 | 13 | 16 | 15 | 10 | 3 | -2 | -6 |
| Rain mm | 49 | 39 | 41 | 44 | 66 | 64 | 83 | 76 | 77 | 67 | 64 | 60 |
📋 Practical info
Geography
Facts
- The total length of the river is exactly 107 kilometers.
- The elevation drop from the lake to the sea is 122 meters.
- There are a total of 12 hydroelectric power plants along the river.
- Pyhäkoski is one of the largest plants, generating 147 megawatts.
- In the 19th century, Oulu was the world's leading pine tar port.
- The river is typically frozen from November until May.
Explore nearby
Notable places around
Route planner — Car & Motorhome
Where do you start? We build the route here, with stops and country notes along the way.
© OpenStreetMap contributors · OpenRouteService
Sights in the town Oulujoki (1)
Sights nearby
Frequently asked questions
Where does the Oulujoki River flow?
What was the river's historical importance?
Are there hydroelectric power plants?
Can you go fishing on the Oulujoki?
What is the Merikoski power plant?
Oulujoki: where is it located?
Oulujoki: when is the best time to visit?
Oulujoki: why is it worth visiting?




















