About the Horicon National Wildlife Refuge
Friends of the Horicon National Wildlife Refuge
In Depth
Overview
At over 32,000 acres in size, Horicon marsh is the largest freshwater cattail marsh
in the United States. The marsh provides habitat for endangered species and is a
critical rest stop for migrating ducks and Canada geese. It is recognized as a
Wetland of International Importance, as both Globally and State Important Bird
Areas and is also a unit of the Ice Age Scientific Reserve.