The Red Cedar River is a 51.1-mile-long (82.2 km) river in the U.S. state of Michigan. The river, which is a tributary of the Grand River in Michigan's Lower Peninsula, drains a watershed of approximately 461 square miles (1,190 km2) in the Lansing–East Lansing metropolitan area and suburban and rural areas to the east. The river flows through the campus of Michigan State University, and is considered a cultural symbol of the school, including being mentioned in the school's fight song.