Wisconsin Islands Wilderness, Protected wilderness area in Door County, United States.
Wisconsin Islands Wilderness consists of three limestone islands in Lake Michigan situated in Door County. These islands, named Spider, Gravel, and Hog Island, form a protected natural area covering roughly 29 acres in total.
The islands were placed under federal protection in 1913 to safeguard migratory bird populations. They received official wilderness designation in 1970 through federal legislation.
The wilderness area represents a commitment to environmental conservation, forming part of the National Wildlife Refuge System that maintains natural habitats across the United States.
The islands are completely closed to public entry, and boats must maintain a distance of at least one quarter mile from the shoreline. This restriction protects active nesting colonies and allows visitors to observe the area only from a safe distance.
This area ranks among the rarest wilderness zones in the United States with complete public closure, preserving its unaltered natural state indefinitely. The total exclusion of visitors represents an uncommon conservation approach that prioritizes ecological integrity above recreational access.
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