Via the Sheboygan, it is part of the watershed of Lake Michigan, draining an area of 88 square miles (228 km²) in a primarily agricultural area[5] of the Eastern Ridges and Lowlands region of Wisconsin.

The Mullet River issues from Mullet Lake in the town of Forest in eastern Fond du Lac County and flows generally eastwardly into Sheboygan County, passing through the village of Glenbeulah and the city of Plymouth.

[5] In the town of Greenbush in western Sheboygan County, the Wisconsin Historical Society maintains a functioning replica of the Herrling Sawmill on the river; the original turbine-powered sawmill stood on the same location from 1854 to 1910.

[1] Media related to Mullet River at Wikimedia Commons

This article related to a river in Wisconsin is a stub.