| Maple River | |
| Map: | Maple River (Grand River Watershed) Map US MI.svg |
| Map Size: | 300 |
| Pushpin Map Size: | 300 |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Michigan |
| Subdivision Type3: | Counties |
| Subdivision Name3: | Clinton, Ionia, Gratiot, Shiawassee |
| Subdivision Type5: | Municipalities |
| Subdivision Name5: | Ovid, Elsie, Maple Rapids, Muir |
| Length: | 74miles |
| Discharge1 Location: | mouth |
| Discharge1 Avg: | 753.4cuft/s (estimate)[1] |
| Source1 Location: | Shiawassee Township, Shiawassee County |
| Source1 Coordinates: | 42.945°N -84.1147°W |
| Mouth: | Grand River |
| Mouth Location: | Muir |
| Mouth Coordinates: | 42.9958°N -84.955°W |
| Basin Size: | 944sqmi |
| Tributaries Left: | Little Maple River |
| Tributaries Right: | Pine Creek |
The Maple River is a 74.1adj=midNaNadj=mid[2] tributary of the Grand River in the central part of the Lower Peninsula of the U.S. state of Michigan. It rises in Shiawassee Township, Shiawassee County south of the city of Owosso. It flows west through Clinton, Gratiot and Ionia counties, flowing into the Grand River at Muir. Other cities it flows through along the way include Ovid, Elsie and Maple Rapids.[3]
There are 5 major dams along the river and its tributaries: Lake Victoria, Lake Ovid, Elsie, Rainbow and Hubbardston. Portions of the river within Clinton, Gratiot, and Ionia counties are organized as the Maple River State Game Area.[4] The Maple River and Grand River cross and generally run adjacent to the CIS Trail, a multi-use 41-mile gravel pathway on a former railroad bed.[5]