Oulankajoki is a river located in northern Finland, flowing through the Oulanka National Park. It is known for its stunning natural beauty, featuring deep gorges, rapids, and diverse wildlife. The river is a popular destination for outdoor activities such as hiking, canoeing, and fishing. The river stretches approximately 50 kilometers and is part of the Kemi River basin. Its waters are clear and cold, making it an important habitat for various fish species. The surrounding area is rich in biodiversity, attracting nature enthusiasts and photographers year-round.