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Horicon Marsh, Mayville

Categories: Wildlife Areas, Nature & Parks
Inspirock Rating:
4.9/5 based on 120+ 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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  • We were here in september of 2016. On sundays, the federal site is closed - no informational signs at the main building, no brochures in case you wanted to wander off on the paths, no bathrooms on a c...  read more »
  • There are barely words for this place. Took the trail from the Explorium visitor center, about an hour and a half leisurely walk, on a cloudy fall morning and met only three other people, but 4 sandhi...  read more »
  • My husband and I have visited the Horicon Marsh about 10 times. We always hike alot around the marsh area and trails. It never fails that I somehow manage to step on a snake, which I don't see until m...  read more »
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