2018 Map of Rocky Island

About this map

Devils Island and its surrounding waters define the northern reaches of this maritime landscape within the Apostle Islands National Lakeshore. Situated in Lake Superior, this remote archipelago is documented with precision, showing the isolated landmasses of Rocky Island, South Twin Island, Bear Island, and Otter Island. The map illustrates the bathymetry and shoreline characteristics that define the northern tip of Wisconsin, including the submerged hazards of Devils Island Shoal. This modern survey by the U.S. Geological Survey captures the protected geography of the islands as they exist today, serving as a detailed record of the natural boundaries and landforms that constitute this unique national treasure. The absence of traditional road networks emphasizes the wilderness character of the islands, where navigation is dictated by the water and the rugged coastal edges of the Apostle Islands.