57 Passage Island (MI 1) latitude 48° 13' 24.2" N longitude 88° 22' 1.2" W July 31, 2004 This light marks the eastern edge of Thunder Bay. It can only be seen from a boat, and that very carefully as the walls are steep in places, and very shallow in others. This is the Northernmost lighthouse in the continental US. Any farther north and you are in Canada. ARLHS # USA 583
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