Osage River

The Osage River is the 8th largest river in the state of Missouri. It rises at the confluence of the Little Osage and the Marais Des Cygnes Rivers. From this confluence, the river flows east in a meandering fashion. As it enters the western edge of Truman Reservoir, it collects Clear Creek and then the Sac River. The Sac River flows from the Ozarks. By Harry S. Truman Dam, the Osage collects the South Grand River from the north and the Pomme De Terre River. Below the dam, the Lake of the Ozarks begins. It is here in the Lake of the Ozarks that the Niangua River enters the Osage. Above Bagnell Dam, Grandglaize Creek enters the lake. Below Bagnell Dam, the wild Osage River begins. It collects Gravois Creek below the dam. Several miles later it collects Tavern Creek. Maries River joins from the south near the Missouri River. It finally joins the Missouri at River Mile 130.