Oulujärvi Hiking Area was established in 1993 and includes 78 km2 of land and water areas on both Manamansalo Island and the Niskanselkä section of Lake Oulujärvi. More than 80 per cent of the area is water. The hiking area contains both commercial forest and areas covered by conservation programmes. The islands of Manamansalo and Kuosto offer about 20 km of marked trails. The diverse nature can also be explored by canoe or boat.