Trip Planner: USA / Wisconsin / Mayville / Wildlife Areas / Horicon Marsh

Horicon Marsh, Mayville

4.9

#9 of 33 in Wildlife Areas in Wisconsin

Wildlife Area Nature / Park

Horicon Marsh is a marsh located in northern Dodge and southern Fond du Lac counties of Wisconsin. It is the site of both a national and a state wildlife refuge. The extinct glacial lake is the largest freshwater cattail marsh in the United States.Geological historyHoricon Marsh was created by the Green Bay lobe of the Wisconsin glaciation during the Pleistocene era. The glacier, during its advance created many drumlins (a type of knoll) in the region, many of which have become the islands of Horicon Marsh. The marsh and surrounding Dodge County have the highest concentration of drumlins in the world.During the glacier's retreat, a moraine was created, forming a natural dam holding back the waters from the melting glacier and forming Glacial Lake Horicon. The Rock River slowly eroded the moraine, and the lake drained. As the levels of silt, clay and peat accumulated in the former lake's basin, the Horicon Marsh was formed.The Horicon Marsh State Wildlife Area is one of nine units of the Ice Age National Scientific Reserve system, being considered to contain unique, representative evidence of the Ice Age of the Pleistocene era.

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138 reviews

JustSkippy

Nice area to take a walk - lots of birds. After a while it all looks about the same. There is a boat ride you can do so that would be good for a family. If you like bird watching - this would be a gre... more »
khsampon

There are both long and short hiking trails within the 32,000 acres of this national and state wildlife refuge and largest freshwater cattail marsh in the US. Wear good walking shoes because the paths... more »
KimSpringer

I've been bird watching seriously for 22 years, and this place is absolutely amazing! I added a good number of new Birds to my life list! There are so many places to birdwatch. You need to stop in one... more »