Horicon National Wildlife Refuge

Spanning more than 33,000 acres across Dodge and Fond du Lac counties, Horicon Marsh is one of the largest freshwater marshes in the United States. The northern two-thirds of the marsh is protected as the 22,000-acre Horicon National Wildlife Refuge, managed by the U.S. Fish and Wildlife Service.

A major stopover for migratory birds, the marsh is known for its seasonal wildlife viewing, particularly during spring and fall migrations. Within the refuge, visitors can explore 10 miles of hiking trails, including a floating boardwalk that extends into the marsh, or follow a three-mile driving loop for an easy way to experience the landscape. The visitor center features exhibits, native gardens, and access to additional trails.

Throughout the year, Horicon Marsh offers opportunities for birdwatching, photography, bicycling, fishing, snowshoeing, and cross-country skiing, making it a destination worth visiting in every season.