Cass River Michigan

The Cass River is a 61.5-mile-long river in the Thumb region of the U.S. state of Michigan. It drains large portions of Sanilac and Tuscola counties and smaller portions of Genesee, Huron, Lapeer, and Saginaw counties.
  • Mouth: Shiawassee River
  • Length: 61.5 mi (99.0 km)
  • River system: Saginaw River
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