The Cass River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data
The National Map
, accessed November 7, 2011

river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of ...

in the Thumb region of the U.S. state of

Michigan Michigan () is a state in the Great Lakes region of the upper Midwestern United States. With a population of nearly 10.12 million and an area of nearly , Michigan is the 10th-largest state by population, the 11th-largest by area, and t ...

. It drains large portions of Sanilac and Tuscola counties and smaller portions of

Genesee Genesee, derived from the Seneca word for "pleasant valley", may refer to: Geographic features Canada *Genesee, Alberta, an unincorporated community United States *Genesee, California *Genesee, Colorado *Genesee County, Michigan *Genesee Co ...

Huron Huron may refer to: People * Wyandot people (or Wendat), indigenous to North America * Wyandot language, spoken by them * Huron-Wendat Nation, a Huron-Wendat First Nation with a community in Wendake, Quebec * Nottawaseppi Huron Band of Potawato ...

, Lapeer, and

Saginaw Saginaw () is a city in the U.S. state of Michigan and the seat of Saginaw County. The city of Saginaw and Saginaw County are both in the area known as Mid-Michigan. Saginaw is adjacent to Saginaw Charter Township and considered part of Greater ...

counties. It flows into the

Shiawassee River The Shiawassee River ( ) in the U.S. state of Michigan drains an area of within Oakland, Genesee, Livingston, Shiawassee, Midland and Saginaw counties. It flows in a generally northerly direction for approximately from its source to its co ...

in the

Shiawassee National Wildlife Refuge The Shiawassee National Wildlife Refuge is a National Wildlife Refuge in Saginaw County managed by the United States Fish and Wildlife Service. It is located in the central portion of the lower peninsula of the U.S. state of Michigan, approximate ...

at less than a mile from where the Shiawassee merges with the

Tittabawassee River The Tittabawassee River flows in a generally southeasterly direction through the Lower Peninsula of the U.S. state of Michigan. The river begins at Secord Lake in Clement Township, at the confluence of the East Branch and the Middle Branch. Fro ...

to form the Saginaw River southwest of the city of

. The Saginaw River is a tributary of

Lake Huron Lake Huron ( ) is one of the five Great Lakes of North America. Hydrologically, it comprises the easterly portion of Lake Michigan–Huron, having the same surface elevation as Lake Michigan, to which it is connected by the , Straits of Mack ...

. The Cass River flows through or very near

Bridgeport Bridgeport is the most populous city and a major port in the U.S. state of Connecticut. With a population of 148,654 in 2020, it is also the fifth-most populous in New England. Located in eastern Fairfield County at the mouth of the Pequonn ...

, Frankenmuth, Tuscola, Vassar,

Caro Caro may refer to: Places * Caro, Michigan, United States * Caro, Morbihan, France * Çaro, Pyrénées-Atlantiques, France Other uses * Caro (given name), including a list of people with the given name * Caro (surname), including a list of peo ...

, and Cass City. The main branch of the Cass River is formed by the confluence of the North and South branches at , just south of Cass City. The Middle Branch joins the South Branch at 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 in

Greenleaf Township, Michigan Greenleaf Township is a civil township of Sanilac County in the U.S. state of Michigan. As of the 2000 census, the township population was 804. Communities Unincorporated communities in the township are: *New Greenleaf is located at Hadley Road ...

in Sanilac County.

References

Rivers of Michigan Rivers of Huron County, Michigan Rivers of Saginaw County, Michigan Rivers of Sanilac County, Michigan Rivers of Tuscola County, Michigan Tributaries of Lake Huron {{Michigan-river-stub