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.