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Horicon Marsh, Mayville
(4.9/5 based on 130+ reviews on the web)
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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Reviews
TripAdvisor
  • Largest freshwater cattail marsh in the United States. Boating, hiking and commercial tours. Canoe and kayak rentals for the adventuresome. 200 species of birds pass through or live in the marsh's 32,...  more »
  • Love the visit. Only managed to the auto tour. Will be back to see more of its next year. Nice facilities and friendly staffs at the educational center. Must see if you are around! 
  • From the visitor center, there are several ways to explore the area. The staff is helpful and knows everything about the Park. With a little luck, you can see many animals. A visit is always worthwhile.
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