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50 free Isle Royale National Park trivia questions with answers — geography quiz, new questions added Aug 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 50 questions with answers and explanations. Play the quiz
Q 01Isle Royale National Park lies in which of the Great Lakes?
Superior
The main island is the largest natural island in that lake and the second-largest in all the Great Lakes after Manitoulin.
Q 02Isle Royale is about 15 miles from Ontario and Minnesota, but how many miles from the Michigan shore?
56
The nearest Michigan land is the Keweenaw Peninsula on the Upper Peninsula; Thunder Bay and Grand Portage are far closer.
Q 03How long is Isle Royale?
45 miles
It is 9 miles across at its widest, and at about 207 square miles is the fifth-largest lake island in the world.
Q 04In which year was Isle Royale National Park established?
1940
Congress authorised it in 1931 and Franklin Roosevelt made it official on April 3, 1940; wilderness designation followed in 1976.
Q 05Isle Royale is the only US national park to do what every winter?
Close entirely
It shuts from November 1 to April 15 because of the brutal lake weather, which makes the crossing deadly.
Q 06Among contiguous-US national parks, where did Isle Royale rank for visitors in the 2010s?
Least visited
Only three remote Alaskan parks got fewer visitors; annual visits averaged about 19,000 from 2009 to 2018.
Q 07Which two animals are the subjects of the world's longest-running predator-prey study on Isle Royale?
Wolves and moose
Neither species is native to the island; the study began in 1958 and is famous because no bears complicate the picture.
Q 08How are wolves believed to have first reached Isle Royale in 1949?
Across an ice bridge from Ontario
Possibly a single pair crossed during a harsh winter, which is why the population has suffered severe inbreeding ever since.
Q 09Genetic evidence suggests moose reached Isle Royale in the early 1900s how?
Introduced by humans as game for a hunting preserve
Island moose are most closely related to those of far northwestern Minnesota, and the Washington Harbor Club owned railroads that could have shipped them.
Q 10By 2016 inbreeding had reduced the island's wolf population to how many animals?
2
Meanwhile the moose herd had exploded to about 1,600; by November 2017 a single female wolf was left.
Q 11How many wolves did the Park Service relocate to Isle Royale between September 2018 and September 2019?
19
They came from Minnesota, the Upper Peninsula and Ontario after the agency approved moving 20 to 30 animals; about 14 survived by April 2020.
Q 12The virile male wolf that crossed the ice from Ontario in 1997 was nicknamed what?
Old Gray Guy
Designated M93, he was the first adult to join the population since the study began; his descendants soon inbred with one another anyway.
Q 13What was the highest number of wolves ever counted on Isle Royale, recorded in 1980?
50
The population crashed to 14 by 1982; the moose peak was 2,450 in 1995.
Q 21The Moose Boulder hoax claimed that Ryan Island, in the biggest lake on Isle Royale, held what?
A rock standing in a seasonal pond
That would have made it the largest island in the largest lake on the largest island in the largest lake on the largest island in the largest lake; in 2020 it was confirmed the pond does not exist.
Q 22Wheeled vehicles are banned on Isle Royale with what single exception?
Wheelchairs
There are no roads; the Park Service uses tractors and UTVs only in the developed areas, and carts are lent for luggage at the marina.
Q 23What is the name of the National Park Service ship that carries visitors from Houghton to the island?
Q 14Rolf Peterson and John Vucetich, the lead wolf-moose researchers, are professors at which institution?
Michigan Tech
A 2017 study by the team found island moose skulls had shrunk 16 percent over 40 years, consistent with warming winters.
Q 15With birch and aspen browsed out, balsam fir made up what share of Isle Royale moose diet?
59%
They have even been seen eating lichen, which Peterson compared to eating dust.
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
The last caribou was seen in 1925 and the lynx were gone by the 1930s; the snowshoe hares the lynx hunted remain.
Q 17Roughly what fraction of mainland mammal species have colonised remote Isle Royale?
About a third
Red foxes, beavers, red squirrels, mink and ermine are among those that made it; foxes prowl the campgrounds at dawn for scraps.
Q 18What is the highest point on Isle Royale, at 1,394 feet?
Mount Desor
That is only about 800 feet above the lake; the 40-mile Greenstone Ridge Trail passes over it.
Q 19How long is the Greenstone Ridge Trail, the longest in the park, running the length of the island?
40 miles
Most hikers take four or five days and catch a boat shuttle back to their starting point; the park has about 165 miles of trail in all.
Q 20What is the largest body of water on Isle Royale itself?
Siskiwit Lake
Its cold, clear water is low in nutrients and holds several islands, the biggest of which is Ryan Island.
Ranger III
At 165 feet it is said to be the largest piece of equipment in the park system; the crossing takes six hours and it makes two round trips a week.
Q 24The island's southwest developed area, formerly Windigo, was renamed what Native name?
Ozaagaateng
Ferries from Grand Portage, Minnesota land there; those from the Upper Peninsula dock at the northeast end.
Q 25How many designated wilderness campgrounds does the park have?
36
Many offer three-sided screened shelters; most ban campfires and all water must be filtered, treated or boiled.
Q 26Which Upper Peninsula port sends the ferry Isle Royale Queen to the island in about three hours?
Copper Harbor
Grand Portage, Minnesota, offers the fastest crossing at about an hour and a half aboard the Sea Hunter.
Q 27Copper artifacts show people were mining Isle Royale at least how long ago?
6,500 years
Hundreds of ancient pits and trenches up to 65 feet deep dot the island.
Q 28What native name for the island did a Jesuit missionary record in 1669-70 as famed for its copper?
Minong
The name lives on in a ridge and a mine, and the whole island chain was listed on the National Register in 2019 as the Minong Traditional Cultural Property.
Q 29Which Native nation ceded Isle Royale to the United States in the 1842 Treaty of La Pointe?
Ojibwe
The Grand Portage Band did not realise the island was not British; they reaffirmed the deal in an 1844 agreement after the border was clarified.
Q 30Whose mid-1840s report as the state's first geologist set off the copper boom that opened the island's first mines?
Douglass Houghton
Most 19th-century mines failed fast because the veins were small and the island remote; a brief revival ran from 1873 to 1881.