PADDLERS SHOULD STAY TO THE RIGHT WHEN PADDLING DOWNSTREAM TOWARD SAGINAW. The Cass River enters the Shiawassee River approximately 2 miles downstream of M-13. As the Cass River ends and flows into the Shiawassee, the river opens up into a very wide expanse of water. Soon after entering the Shiawassee River, the Tittabawassee River will flow in from the left (west). After the confluence of the rivers, Wickes Park will be on the paddlers right side, which is the east side of the Saginaw River.