South Grand River

The South Grand River is a tributary of the Osage River. It rises in Cass County at the confluence of East and Massey Creeks. The South Grand then flows southeast where it meets Poney Creek. It becomes channelized southeast of Grand River Church and it meets the South Fork South Grand River. The river remains channelized. This was used as a flood control and agricultural maneuver. Near Urich it collects White Oak Creek. Further southeast it collects Big Creek. Past this confluence the river slows down and meanders. Near Clinton, it becomes an arm of Truman Reservoir. It collects Deepwater Creek. After meandering some distance it then collects Tebo Creek. It meets the Osage River at the Truman Dam.

The river is floatable, however land ownership issues get in the way of floating. The river is not scenic as it flows past farmland. The water quality of the river is muddy as it's a prairie river. Its lower reaches in the reservoir are popular for boating.