Rock Harbor (Michigan)

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Rock Harbor is the main access point for visitors landing on Isle Royale in northern Lake Superior. It sits 4 miles from the northeastern end of the forty-five mile long island, the whole of which is protected as Isle Royale National Park. Two structures in Rock Harbor -- the Rock Harbor Light and the Edisen Fishery -- are listed on the National Register of Historic Places.

Rock Harbor Lighthouse, located at Middle Islands Passage

The Rock Harbor name is properly applied to the eleven-mile long inlet from Moskey Basin to Scoville Point along the southern shore of the easterly part of Isle Royale;[1] this inlet is screened from the open waters of Lake Superior by a number of offshore islands, including Mott Island, the site of the Park headquarters.[2]

Travel to Rock Harbor from the Upper Peninsula of Michigan is by the Ranger III park service ferry, operating from Houghton, Michigan,[3] the Isle Royale Queen IV out of Copper Harbor, Michigan,[4] and seaplane service;[5] the Voyageur II operates out of Grand Portage, Minnesota; it circumnavigates the island with stops at Windigo Ranger Station in Washington Harbor on the west end of the island and other points along the shore.[6]

The ferry boats land at Snug Harbor, which also has berths for private watercraft, a campground, the visitor center, and a lodge that predates the national park.[2][7]

Rock Harbor is the eastern end and terminus of the Greenstone Ridge Trail.


  1. ^ Park (PDF) (Map). National Park Service. Archived from the original (PDF) on 2007-08-13. Retrieved 2007-12-11.
  2. ^ a b Rock Harbor Area (Map). National Park Service. Retrieved 2001-12-01.
  3. ^ "Ranger III". National Park Service. Retrieved 2007-12-01.
  4. ^ "The Isle Royale Line". Retrieved 2007-12-01.
  5. ^ "Royale Air Service". Archived from the original on 2009-03-01. Retrieved 2007-12-01.
  6. ^ "Schedules". The North Shore Connection to Isle Royal National Park. Grand Portage-Isle Royale Transportation Line. Retrieved 2007-12-01.; Designated stops, Isle Royale (Map). Grand Portage-Isle Royale Transportation Line. Retrieved 2007-12-01.
  7. ^ "Rock Harbor Area". Hunt's Guide to Michigan's Upper Peninsula. Retrieved 2007-12-01.

Coordinates: 48°08′41″N 88°29′12″W / 48.1448°N 88.4868°W / 48.1448; -88.4868