The Red Cedar River is a westward flowing river in Michigan which is a tributary of the Grand River. Its source is Cedar Lake which is located in Marion Township in the southeastern corner of Livingston County, and it runs about 45 miles through Okemos, East Lansing, including the campus of Michigan State University, and finally Lansing where it empties into the Grand River. It has a West and Middle branch, each of which also originates in southern Livingston County.