Onion River (Sheboygan River tributary)

The Onion River flows for its entire length in Sheboygan County.

It is formed in the town of Lyndon by the confluence of Mill Creek and Ben Nutt Creek, and initially flows southeastwardly, passing through the village of Waldo and then passes through the village of Hingham.

During the past decades, a number of initiatives have occurred to reclaim and restore the Onion River in hopes of encouraging natural trout populations to increase.

In 2008, the Wisconsin Department of Natural Resources reclassified all of the Onion River from County N upstream as a Class I trout stream, meaning that it contains naturally reproducing wild trout.

In 2011, the Lakeshore Chapter of Trout Unlimited, the Wisconsin Department of Natural Resources and Michels Corp. installed lunker structures in six spots along the river, which are expected to minimize erosion and stabilize the habitat for the trout and other wildlife.