A tributary of the Arkansas River, its entire 123-mile (198 km) length lies within the American state of Kansas.
[3] The river originates in central Kansas in the Smoky Hills region of the Great Plains.
[3][4] Its source lies in extreme south-central Ellsworth County immediately north of Geneseo, Kansas.
[4] It joins the Arkansas River immediately northwest of downtown Wichita, Kansas.
[4][6] A statue, The Keeper of the Plains by local artist Blackbear Bosin, marks the confluence of these two rivers.