Isle Royale National Park Trivia
0Loading crowd target
0Loading crowd target
6correct to beat the crowd
48 free Isle Royale National Park trivia questions with answers — geography quiz, new questions added Oct 2026.
This Isle Royale National Park trivia quiz covers the roadless island wilderness in Lake Superior that most Americans never reach: 45 miles long, 400 smaller islands, no permanent residents, closed all winter and the least-visited national park in the lower 48. Questions cover the geography and geology, the Greenstone Ridge Trail, the ferries and the NPS ship Ranger III, the interior lakes and the greenstone gem that is Michigan's state stone. The heart of the quiz is the famous wolf and moose story: how each species arrived, the predator-prey study running since 1958, the ice-bridge wolf called Old Gray Guy, the inbreeding crash to two animals and the 2018 relocation of new wolves. There is also plenty of human history: copper pits 6,500 years old, the Ojibwe treaties, Angelique Mott's terrible winter, Scandinavian fishing families, four lighthouses, the wreck of the SS America and the Moose Boulder hoax. Difficulty runs from easy to expert and is marked on every question, so it works for a ferry-crossing game or a serious park-nerd challenge. Every answer was checked against Wikipedia and each question carries its citation. If you enjoy it, try our US National Parks quiz next.
30 of 48 questions with answers and explanations. Play the quiz
Q 01Isle Royale National Park lies in which of the Great Lakes?
Superior
Superior. The island belongs to Michigan, yet it lies about 15 miles from the Canadian shore and 56 miles from the nearest Michigan mainland.
Q 02The nearest part of Michigan to Isle Royale, 56 miles away, is which peninsula?
Keweenaw Peninsula
Keweenaw Peninsula. Ferries from its ports need three and a half to six hours to cross, while a boat from the far closer Minnesota shore can do it in ninety minutes.
Q 03Isle Royale lies closer to Minnesota than to Michigan; which time zone does it keep?
Eastern
Eastern. The island belongs to a Michigan county, while ferries from Minnesota run on Central time, so the park warns visitors that each boat keeps its home port's clock.
Q 04Besides boats, what is the only other way visitors reach Isle Royale?
Seaplane
Seaplane. The flight takes about 40 minutes, against six hours on the Park Service's own ferry from the Michigan side.
Q 05Isle Royale is the only US national park to do what every winter?
Close entirely
Close entirely. From November 1 to April 15 the island and the water for 4.5 miles around it are shut to visitors, because winter weather makes the crossing too dangerous.
Q 06In 2018 only three US national parks drew fewer visitors than Isle Royale; in which state are all three?
Alaska
Alaska. Gates of the Arctic, Lake Clark and Kobuk Valley are reached mostly by bush plane, while every one of Isle Royale's 25,798 visitors that year had to cross the lake.
Q 07Isle Royale's wolf-moose research holds which record?
Longest-running predator-prey study
Longest-running predator-prey study. Scientists first thought the two populations would settle into a steady balance; instead both have swung wildly in the decades since it began in 1958.
Q 08How are wolves believed to have first reached Isle Royale in the late 1940s?
Across an ice bridge from Ontario
Across an ice bridge from Ontario. So few animals made the crossing that the island's wolves all traced back to a single female, and the pack grew badly inbred.
Q 09Genetic studies suggest Isle Royale's moose did not swim there in the early 1900s, but arrived how?
Brought over by people
Brought over by people. Their closest relatives live not on the nearby shore but far off in northwestern Minnesota, a hint that someone shipped them in, perhaps to stock a hunting preserve.
Q 10How were Isle Royale's last two wolves related?
Father and daughter
Father and daughter. By 2016 inbreeding had left only this pair, half-siblings as well through a shared mother, and the one pup they are thought to have produced was visibly deformed.
Q 11With Isle Royale down to two wolves, what did the Park Service do?
Released new wolves
Released new wolves. The agency had first decided not to step in, then reversed itself and from 2018 set free 19 animals caught around the Great Lakes.
Q 12What did one outsider wolf's arrival in 1997 do to Isle Royale's wolves?
Refreshed their genes
Refreshed their genes. Nicknamed Old Gray Guy as his coat paled with age, he came to dominate the island's bloodlines, and inbreeding fell sharply until his own descendants began pairing off.
Q 13The virus that crashed Isle Royale's wolves around 1980 probably arrived with what?
A dog
Q 21The 'Moose Boulder' hoax claimed that Ryan Island, in Isle Royale's largest lake, held what?
A rock in a seasonal pond
A rock in a seasonal pond. That would have made it an island in a lake on an island in a lake on an island in a lake, until a mother and son paddled out and found there was no pond at all.
Q 22Which wheeled devices are always allowed on Isle Royale's trails?
Wheelchairs
Wheelchairs. Even portage wheels for canoes are barred, and bicycles are tolerated only around the two harbour settlements, never on the trails.
Q 23What is the name of the National Park Service's own passenger ship to Isle Royale?
Ranger III
A dog. Canine parvovirus, probably carried by a pet, cut the wolves from 50 to 14 within two years, the kind of outbreak the park's ban on pets, even aboard boats offshore, is meant to prevent.
Q 14Rolf Peterson and John Vucetich, leaders of Isle Royale's wolf-moose study, are professors at which university?
Michigan Tech
Michigan Tech. Its team measured hundreds of moose skulls collected over forty years and found they had shrunk by about 16 per cent as the herd grew crowded and winters warmed.
Q 15Which tree is the main winter food of Isle Royale's moose?
Balsam fir
Balsam fir. With the leafy plants gone, moose browse the firs so hard in winter that young trees can stay stunted for years.
Q 16Which two large mammals lived on Isle Royale for 3,500 years until humans wiped them out shortly before the park began?
Lynx and woodland caribou
Lynx and woodland caribou. Hunters finished off the caribou, last seen in 1925, and trappers had cleared out the lynx by the 1930s, just before the island became a park.
Q 17Moose get the fame, but which animal does the Park Service call Isle Royale's most commonly seen mammal?
Red squirrel
Red squirrel. It is the only squirrel on the island and one of very few rodents, and with so little competition it has spread through every patch of forest.
Q 18What is the highest point on Isle Royale?
Mount Desor
Mount Desor. It stands only about 800 feet above the lake, and its summit is so thickly wooded that hikers who reach it get almost no view.
Q 19Which trail runs the length of Isle Royale along its central ridge?
Greenstone Ridge Trail
Greenstone Ridge Trail. Walking it end to end takes most backpackers the better part of a week, after which they ride a boat back to where they started.
Q 20What is the largest lake on Isle Royale itself?
Siskiwit Lake
Siskiwit Lake. In the great fire of 1936, which burned about a fifth of the island, the flames almost completely ringed its shores.
Ranger III. Built for the park in 1958 to replace a war-surplus wooden ship, it is the largest vessel the Park Service runs and still makes the six-hour crossing.
Q 24Isle Royale is retiring the name Windigo; what is a windigo?
Evil spirit
Evil spirit. A mining company borrowed the name in the nineteenth century, and at a local band's request the station now takes the harbour's own name, Ozaagaateng, 'the place where it shines outward'.
Q 25'Old Man's Beard', which hangs from Isle Royale's spruce and fir branches, is what kind of organism?
A lichen
A lichen. It cannot tolerate polluted air, so the pale tangles that drape the island's trees are a sign of just how clean the air there is.
Q 26Which Upper Peninsula port sends the ferry Isle Royale Queen IV to the island in about three and a half hours?
Copper Harbor
Copper Harbor. The village sits at the very tip of the peninsula, the closest Michigan port to the island, so its boat needs little more than half the time of the Park Service's own ferry.
Q 27Isle Royale is the third-largest island in the contiguous United States, behind Long Island and which Texas barrier island?
Padre Island
Padre Island. A dredged ship channel has cut it in two, yet it still counts as one island and narrowly edges out Isle Royale.
Q 28What Native name for Isle Royale did the Jesuit Claude Dablon put on record around 1670?
Minong
Minong. The Grand Portage Band never stopped using the island, and in 2019 its long ties to the place put the whole archipelago on the National Register as a traditional cultural property.
Q 29Which Native nation ceded Isle Royale to the United States in the 1842 Treaty of La Pointe?
Ojibwe
Ojibwe. The Grand Portage Band, the people who actually fished and hunted on the island, had been left out of that treaty and signed a separate Isle Royale compact in 1844.
Q 30Whose report as Michigan's first state geologist set off the copper rush that opened Isle Royale's first modern mines?
Douglass Houghton
Douglass Houghton. His 1841 report started the rush, but he did not live to see it peak: he drowned in 1845 when his small boat went down in a storm on the lake.