Black River (Mackinac County)

Black River is an 11.0 mi river on the Upper Peninsula of the U.S. state of Michigan. The river flows into Lake Michigan at 46.09361°N, -85.34167°W, approximately 5 mi east of Naubinway.

The main branch of the river rises at 46.19972°N, -85.37028°W in a marshy area in eastern Garfield Township near Cranberry Lake Bog. The East Branch rises at 46.13472°N, -85.27944°W in Hudson Township and joins the main course at 46.09639°N, -85.34°W. All of the river's drainage basin is within Mackinac County, much of it within the Lake Superior State Forest.

Tributaries (from the mouth):
 * East Branch Black River
 * Borgstrom Creek
 * Peters Creek
 * Silver Creek
 * Bark Creek