The '''Cass River''' is a 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. It flows into the Shiawassee_River in the Shiawassee_National_Wildlife_Refuge at {{coor dms|43|22|42|N|83|59|04|W|}} less than a mile from where the Shiawassee merges with the Tittabawassee_River to form the Saginaw_River southwest of the city of Saginaw. The Cass River flows through or very near *Bridgeport *Frankenmuth *Tuscola *Vassar *Caro *Cass City The Main Branch is formed by the confluence of the North and South Branches at {{coor dms|43|35|11|N|83|10|12|W|}}, just south of Cass City. The Middle Branch joins the South Branch at {{coor dms|43|32|56|N|83|03|04|W|}} in Evergreen Township in Sanilac County. The Middle Branch rises in Elmer Township in Sanilac County. The South Branch rises in Flynn Township, Sanilac County near the boundary with Lapeer County. The North Branch rises in the confluence of several drains northeast of Ubly in Huron County. The headwaters of the South Fork of the North Branch are drains in the south of Paris Township in southeast Huron County. The South Fork of the North Branch is formed by the confluence of drains in Minden Township in north central Sanilac County. The South Fork flows into the North Branch at {{coor dms|43|39|17|N|83|01|50|W|}} in Greenleaf_Township,_Michigan in Sanilac County. {{Michigan-geo-stub}} Category:Rivers_of_Michigan Category:Huron_County,_Michigan Category:Saginaw_County,_Michigan Category:Sanilac_County,_Michigan Category:Tuscola_County,_Michigan