2017 Map of Passage Island

About this map

Isle Royale National Park sits surrounded by the waters of Lake Superior in this remote northern reach of Michigan. This survey focuses on the small landform of Passage Island, situated within township boundaries t67n r32w and t68n r32w. The map illustrates the isolated nature of this outpost, separated from the main landmass of the national park by several miles of open water. The island's topography is clearly defined, showing the elongated shape and rocky character common to the archipelago's ridge-and-valley structure. This modern topographic study by the U.S. Geological Survey captures the maritime isolation and protected wilderness status of this Keweenaw County landmark.