Rock Island State Park is a state park of Wisconsin, United States, located on Rock Island in Lake Michigan off the tip of the Door Peninsula. The only public transportation to the island is by the passenger ferry Karfi from Washington Island. However, there is mooring/dock space for people with their own boats, and during winter the island is accessible via snowmobile and foot traffic. No "wheeled vehicles" (cars, all-terrain vehicles, bicycles, etc.) are allowed to be brought onto the island by visitors (although park staff use them routinely).Activities and amenitiesAttractions include the stone Viking boathouse and other structures built by inventor Chester H. Thordarson, Native American artifacts, as well as Pottawatomie Light (Wisconsin's oldest lighthouse). The island is a popular destination in the fall for deer hunters and in the winter for snowmobilers from nearby Washington Island. The park has campsites available and is a destination for daytrippers.
