Mackinac Bridge
0Loading crowd target
0Loading crowd target
7correct to beat the crowd
40 free Mackinac Bridge trivia questions with answers — geography quiz, new questions added Oct 2026.
The Mackinac Bridge is the suspension bridge that ties Michigan's two peninsulas together, and almost everything about it comes with a story. Locals call it the Mighty Mac, and since 1957 it has replaced the ferries that once made a trip north an all-day gamble. These questions cover the fun facts people actually ask about: how the bridge was designed to handle wind, the records it set, the legends that grew up around its construction, the annual walk, and the rules that surprise first-time visitors. It suits Michiganders, road-trippers planning a crossing, and anyone who likes big engineering. Every answer comes with a short explanation, so you will leave knowing more about the bridge than most people who cross it.
30 of 40 questions with answers and explanations. Play the quiz
Q 01Which nickname do Upper Peninsula residents give Lower Peninsula folk, a joke about living below the Mackinac Bridge?
Trolls
Trolls is the name, because Lower Peninsula residents live "under the bridge"; those north of it answer to Yoopers, from "UP-ers".
Q 02In 1959 an Air Force captain was grounded for life after doing what at the Mackinac Bridge in a B-47 bomber?
Flying beneath it
Flying beneath it earned Captain John Lappo a general court-martial: he took his Boeing Stratojet under a deck with only 155 feet of clearance at mid-span.
Q 03Counting its approaches, roughly how far does a traveler go from one end of the Mackinac Bridge to the other?
5 miles
About 5 miles is the full crossing, 26,372 feet in all, though the main span between the two towers covers only 3,800 feet of it.
Q 04What will Mackinac Bridge Authority staff do, for a small fee, for motorists too nervous to make the crossing?
Drive their car across
Drive their car across is the offer, around the clock, and more than a thousand people a year hand over the keys.
Q 05On which holiday each year may walkers cross the Mackinac Bridge on foot, traditionally led by Michigan's governor?
Labor Day
Labor Day has hosted the walk since 1959, yet only 68 people joined the very first one, held at the bridge's dedication in June 1958.
Q 06In severe winds, how far sideways can the deck at the center of the Mackinac Bridge move by design?
35 feet
35 feet is the limit, east or west, and the deck slides there slowly instead of swaying; the weight of passing vehicles eases it back once the wind drops.
Q 07A stubborn legend says the concrete piers of the Mackinac Bridge hold what, a claim the bridge authority denies?
Bodies of workers
Bodies of workers are not entombed there: five men died building the bridge, and a plaque near its northern end carries their names.
Q 08Which pronunciation of Mackinac is correct for the Mackinac Bridge, whose name keeps a French spelling?
Mack-in-aw
Mack-in-aw is right however the name is spelled: the French wrote the sound as "ac", while the British spelled what they heard.
Q 09Standing on the Mackinac Bridge, a walker has Lake Michigan on one side and which other Great Lake on the other?
Huron
Huron is joined to Lake Michigan so broadly at the straits that hydrologists study the pair as one body of water, Lake Michigan–Huron.
Q 10The Mackinac Bridge's towers are painted ivory, but which color covers its cables and structural steel?
Green
Green is the color, and the bridge authority lists the exact federal paint codes for fans who want to match it on a house or a boat.
Q 11The Mackinac Bridge Authority never salts the bridge deck in winter, chiefly to prevent which problem?
Steel corrosion
Steel corrosion is the worry, so the deck goes unsalted and the authority warns motorists whenever the roadway turns slick.
Q 12Which Discovery Channel series sent host Mike Rowe to work alongside the Mackinac Bridge's maintenance crew in 2007?
Dirty Jobs
Dirty Jobs filmed at the bridge that May, and Rowe joined the crew stripping and repainting the steel inside one of its towers.
Q 13With its causeway already built, which event stalled the Mackinac Bridge and saw its first authority abolished in 1947?
World War II
Q 21Which Florida road, like the Mackinac Bridge, is a tolled stretch of the Interstate the bridge carries?
Alligator Alley
Alligator Alley crosses the Everglades on the same Interstate, which also charges a toll on the American half of the International Bridge to Canada.
Q 22Which Michigan governor, nicknamed Soapy, was the first person to pay the toll on the newly opened Mackinac Bridge?
G. Mennen Williams
G. Mennen Williams paid $3.25 to cross, and his portrait in the Michigan State Capitol shows him seated in front of the bridge.
Q 23In 1920 Michigan's highway commissioner proposed which way to cross the Straits, decades before the Mackinac Bridge?
A floating tunnel
World War II halted the project with only a 4,200-foot causeway in place, and a new bridge authority was not created until 1950.
Q 14In 1884 a store ad captioned a drawing of which New York landmark as the proposed span across the Straits of Mackinac?
Brooklyn Bridge
Brooklyn Bridge had been dedicated only a year earlier, and its success gave backers of a Straits crossing fresh encouragement.
Q 15Which U.S. president joined the Mackinac Bridge Walk in 1992, the year it drew its largest crowd?
Bush
George H. W. Bush crossed with an estimated 85,000 walkers that year, the biggest turnout the event has recorded.
Q 16Which Interstate, running from Florida to the Canadian border, is carried across the straits by the Mackinac Bridge?
I-75
I-75 took over the crossing in 1960; for its first three years the bridge carried US 27 instead.
Q 17The 1940 collapse of which span, nicknamed Galloping Gertie, shaped the wind-resistant design of the Mackinac Bridge?
Tacoma Narrows
Tacoma Narrows fell in a 40-mile-per-hour wind four months after opening, so the Michigan crossing was given deep stiffening trusses to steady its deck.
Q 18Before the Mackinac Bridge opened, thousands jammed the Straits ferry docks each November at the start of which season?
Deer hunting
Deer hunting drew such long ferry queues that vendors worked the line selling hot pasties to the waiting hunters.
Q 19Which engineer designed the Mackinac Bridge after publishing a study of why suspension bridges become unstable in wind?
David B. Steinman
David B. Steinman and his firm designed more than 400 bridges on five continents, and he called the Michigan crossing his crowning achievement.
Q 20Which Upper Peninsula city, begun as a French Catholic mission in 1671, sits at the northern end of the Mackinac Bridge?
St. Ignace
St. Ignace gained an eight-acre park for viewing the bridge in 2002, and it is one of two ports with ferries to Mackinac Island.
A floating tunnel was his idea; a rival plan would have hopped a chain of causeways and bridges across three islands from Cheboygan.
Q 24Which term names the fear of crossing bridges, common enough at the Mackinac Bridge that staff offer help?
Gephyrophobia
Gephyrophobia joins the Greek words for bridge and fear, and it tends to be worse on tall spans because it overlaps with a fear of heights.
Q 25Which reconstructed French colonial outpost, founded around 1715, stands beside the southern end of the Mackinac Bridge?
Fort Michilimackinac
Archaeologists began digging at Fort Michilimackinac in 1959, two years after the bridge opened, and the post was rebuilt from what they found.
Q 26Stripping the Mackinac Bridge to bare steel became a 20-year job from 1999 because the old paint held which hazard?
Lead
Lead in the old coats had to be removed and disposed of safely; the zinc-based replacement is expected to last 35 years.
Q 27The Mackinac Bridge was financed by selling investors nearly $100 million of which kind of security, repaid from tolls?
Revenue bonds
Revenue bonds worth $99.8 million found buyers only on the third attempt, and the last of them was retired on July 1, 1986.
Q 28At an 1888 board meeting of which Mackinac Island resort did Cornelius Vanderbilt II urge a bridge across the Straits?
Grand Hotel
Grand Hotel directors were holding their first meeting, and Vanderbilt argued that a bridge would lengthen the short resort season.
Q 29Laid end to end, the wire spun into the Mackinac Bridge's two main cables would stretch roughly how far?
42,000 miles
42,000 miles of wire went into the cables: each one bundles 12,580 wires about a fifth of an inch thick into a cable two feet across.
Q 30Concrete, steel and cables together, roughly how much does the entire Mackinac Bridge weigh?
1 million tons
1 million tons is about right, 1,024,500 by its designer's count, and roughly nine-tenths of that is concrete.