Isle Royale National Park is an American national park consisting of Isle Royale, along with more than 400 small adjacent islands and the surrounding waters of Lake Superior, in the state of Michigan.
Isle Royale is an island of the Great Lakes located in the northwest of Lake Superior and part of the U.S. state of Michigan. The island and the 450 surrounding smaller islands and waters make up Isle Royale National Park.
Chlorastrolite, also known as Isle Royale Greenstone, is a green or bluish green stone. Chlorastrolite has finely radiating or stellate masses that have a "turtleback" pattern. The stellate masses tend to be chatoyant, meaning they have a varying luster. This chatoyancy can be subtranslucent to opaque. Cholorastrolite is a variety of pumpellyite: Ca
2(Mg,Fe)Al
2(SiO
4)(Si
2O
7)•(OH)
2H
2O. Chlorastrolite was once thought to be an impure variety of prehnite or thomsonite.
Rock Harbor is the main access point for visitors landing on Isle Royale in northern Lake Superior. It sits four miles (6.4 km) from the northeastern end of the 45-mile-long (72 km) 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.
The following is a list of Registered Historic Places in Keweenaw County, Michigan.
This National Park Service list is complete through NPS recent listings posted May 31, 2024.
USS Puritan, a civilian transport built by Craig Shipbuilding Company in Toledo, Ohio, was launched in 1901, and lengthened by 26 ft (7.9 m) in 1908. The ship sailed on the Great Lakes in passenger service, was purchased by the U.S. Navy at the end of the war, and returned to passenger service after the war. The ship sank in 1933 near Isle Royale in Lake Superior, and its wreck is listed on the National Register of Historic Places.
SS Kamloops was a Canadian lake freighter that was part of the fleet of Canada Steamship Lines from its launching in 1924 until it sank with all hands in Lake Superior off Isle Royale, Michigan, United States, on or about 7 December 1927.
The Isle Royale Light, or Menagerie Island Light, is a lighthouse within Isle Royale National Park, in Keweenaw County, northern Michigan, United States.
The Rock of Ages Light is a U.S. Coast Guard lighthouse on a small rock outcropping approximately 2.25 miles (3.62 km) west of Washington Island and 3.5 miles (5.6 km) west of Isle Royale, in Eagle Harbor Township, Keweenaw County, Michigan. It is an active aid to navigation.
The Passage Island Light Station is a lighthouse located 3.25 mi (5.23 km) NE of Isle Royale, in NW Lake Superior, Michigan on Passage Island. It was listed on the National Register of Historic Places in 2006.
Washington Island is an uninhabited island in Lake Superior. It is within the boundary of Keweenaw County and Isle Royale National Park, a national park located within the U.S. state of Michigan. It is the westernmost point marked on most maps of the elongated archipelago that makes up this park. However, a small islet called Bottle Island and an even smaller shoal that breaks the lake surface, Rock of Ages, are located further westward.
The Greenstone Ridge Trail is a 40-mile-long (64 km) hiking trail on Isle Royale, in Lake Superior, northern Michigan. The island is within Isle Royale National Park.
The Glenlyon was a freighter built in 1893; it was sunk off the shore of Isle Royale in Lake Superior in 1924 and the remains are still on the lake bottom. The wreck was placed on the National Register of Historic Places in 1984.
Algoma was a screw steamer built in 1883. She sank off Mott Island near Isle Royale in Lake Superior in 1885 and some of her remains are still on the lake bottom. The wreck was placed on the National Register of Historic Places in 1984.
America was a packet boat transporting passengers, mail, and packages between settlements along the North Shore of Lake Superior, an inland sea in central North America. Built in 1898, America sank in Washington Harbor off the shore of Isle Royale in 1928, where the hull still remains. The wreck was placed on the National Register of Historic Places in 1984.
The Henry Chisholm was a wooden freighter that sank off the shore of Isle Royale in Lake Superior in 1898 and the remains are still on the lake bottom. The wreck was placed on the National Register of Historic Places in 1984.
SS Monarch was a passenger-package freighter built in 1890 that operated on the Great Lakes. She was sunk off the shore of Isle Royale in Lake Superior in 1906 and the remains of her wreck and cargo are still on the lake bottom. The wreck was placed on the National Register of Historic Places in 1984.
