Horicon Marsh

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. The mission of the Friends of Horicon Marsh International Education Center is to provide financial and volunteer support for the Wisconsin Department of Natural Resources – Horicon Marsh’s efforts to educate visitors about the needs, values and uses of watersheds, wetlands and wildlife.