2011 Map of Passage Island

About this map

Passage Island sits as a lonely sentinel in the cold expanse of Lake Superior, serving as a critical navigational marker for ships traversing the northern reaches of the Great Lakes. The island is the primary feature of this 2011 survey, dominated at its southwestern tip by the Passage Island Lighthouse. This beacon has historically guided vessels through the narrow channel between the island and the main body of Isle Royale. The landscape here is defined by its isolation, with the surrounding waters of the lake making up the vast majority of the quadrangle. The map captures the island’s narrow, elongated profile, a geologic formation that stands as one of the northernmost points of Michigan’s territory.