| Thunder Bay River | |
|---|---|
.jpg) The Thunder Bay River in Alpena | |
 | |
| Physical characteristics | |
| Source | |
| • location | McCormick Lake near Atlanta |
| • coordinates | 44°57′41″N 84°14′39″W / 44.96139°N 84.24417°W[1] |
| Mouth | |
• location | Thunder Bay in Alpena |
• coordinates | 45°3′40″N 83°25′33″W / 45.06111°N 83.42583°W |
| Length | 75.4 mi (121.3 km) |
The Thunder Bay River is a 75.4-mile-long (121.3 km)[2] river in the U.S. state of Michigan. It drains much of Alpena County and Montmorency County, and a small portion of Oscoda County, into Thunder Bay, a bay of Lake Huron, on the eastern side of northern Michigan. The mouth of the river is in the heart of downtown Alpena and is guarded by the Alpena Light Station.
- ^ "Thunder Bay River". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed November 21, 2011