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1985 Map of Passage Island, 1986 Print
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1985 Map of Passage Island

USGS Topo · Published 1986

About this map

Passage Island stands as a lonely outpost within the northeastern reaches of Isle Royale National Park in Lake Superior. This 1985 survey captures the maritime infrastructure essential for navigating these northern waters, including a Lighthouse, Radio Towers, and a Heliport clustered on the island's southwestern end. The map also delineates the international boundary between Canada and the United States, as well as the provincial and state line separating Ontario and Michigan. Further east, the small cluster of the Gull Islands emerges from the water, marking some of the most remote territory in Houghton Twp. The topography is defined by the stark isolation of the islands, with soundings and depth curves indicating the underwater terrain of the surrounding lake.

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Map Details

Date Portrayed1985
Date Published1986
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions18.2 x 27 inches

Editions of this 1985 Passage Island Map

This is the sole edition of this map. No revisions or reprints were ever made.

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain