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Thunder Bay River - Upper South Branch
| States | Michigan |
| Length | 34.9 miles |
| Watershed Length* | 35 miles |
| Mouth | Thunder Bay River ⤏ Lake Huron |
| GNIS | 1615415 |
Leaflet | © OpenStreetMap contributors
* Note: Watershed is mostly rivers/streams 15+ miles in length.
Data from United States Geological Survey