50 free Arches National Park trivia questions with answers — geography quiz, new questions added Aug 2026.
This Arches National Park trivia quiz covers the park outside Moab, Utah that holds the densest collection of natural stone arches on Earth. It ranges across the famous formations (Delicate Arch, Landscape Arch, Double Arch, Balanced Rock, the Fiery Furnace and Devils Garden), the strange geology of the salt bed and the Entrada Sandstone that made them, and the wildlife and living soil crust that survive in the high desert. There is plenty of history too: the Hungarian prospector who first pitched the area to a railroad, the presidents who created and enlarged the monument, the Civil War veteran who ranched under the arch, Edward Abbey's two ranger summers that became Desert Solitaire, the arch that collapsed one August night in 2008 and the free-solo climb that forced a rule change. Questions run from easy to expert with the difficulty shown on each one, so it works for a road-trip game or a serious park-nerd challenge. Every answer was checked against a reference page and each question carries its citation. If you enjoy this one, try our Yellowstone and US National Parks quizzes next.
30 of 50 questions with answers and explanations. Play the quiz
Q 01Arches National Park sits just north of which small Utah town?
Moab
The park entrance is about 4 miles up US 191 from the town, which is also the base for Canyonlands, the Slickrock mountain-bike trail and the annual Jeep Safari.
Q 02Roughly how many natural sandstone arches has the park catalogued?
More than 2,000
That is the highest density of natural arches anywhere in the world, and new ones are still forming while old ones fall.
Q 03What lies underground beneath the whole park and is the main reason its arches, fins and spires exist?
A thick salt bed
The evaporite layer, thousands of feet thick in places, was left behind when a sea flooded the Paradox Basin and dried up around 300 million years ago.
Q 04Most of the park's arches are carved from which rock formation?
Entrada Sandstone
The salmon-coloured Entrada sits in layer-cake fashion on the buff-coloured Navajo; both are Jurassic desert deposits.
Q 05Hoover protected Arches as a national monument in 1929 using powers from which 1906 law?
The Antiquities Act
The monument was two small, disconnected sections meant to protect the rock formations for their scientific value; full park status did not come for another 42 years.
Q 06In which year was Arches redesignated a national park?
1971
Richard Nixon signed the legislation two years after Lyndon Johnson had greatly enlarged the monument on his way out of office; the park was formally dedicated in May 1972.
Q 07About how much rain does the park receive in an average year?
Under 10 inches
It is classed as a cold semi-arid climate; the scarce, unpredictable rainfall is one reason the soil crust recovers so slowly from footprints.
Q 08What is the highest point in the park?
Elephant Butte
It reaches 5,653 feet; the lowest point, at 4,085 feet, is the visitor center by the highway.
Q 09A 2,500-foot displacement along which named break in the rock layers is visible from the visitor center?
The Moab Fault
Whole sections of rock subsided between the salt domes; in places the layers turned almost on edge.
Q 10The dark, crumbly soil crust that visitors are told never to step on is held together by what?
Cyanobacteria, lichens and fungi
The living crust binds the sand, soaks up rain and gives larger plants a start; one footprint can undo decades of growth.
Q 11Rain mixing with carbon dioxide forms which weak compound that dissolved the cement holding Arches' sandstone fins?
Carbonic acid
It ate away the calcium carbonate between sand grains; gravity then dropped the weakened lower layers out of the fins piece by piece.
Q 12Which Hungarian-born prospector first drew a railroad's attention to the area in 1923?
Alexander Ringhoffer
He wanted the Denver and Rio Grande Western to promote it as a tourist stop; its passenger traffic manager was impressed enough to lobby the Park Service.
Q 13In Arches, what is the prospector's original 'Devils Garden' called today, after surveyors muddled the location?
Klondike Bluffs
Q 21Which climber's free solo of Delicate Arch in May 2006 forced the park to rewrite its climbing rules?
Dean Potter
He made up to six ascents; the old wording only said routes on named arches 'may be closed', which the park attorney judged unenforceable.
Q 22Under post-2006 rules, you may not climb any park arch with an opening larger than what?
Three feet
Balanced Rock is off-limits too, and slacklining and BASE jumping are banned everywhere in the park.
Q 23Landscape Arch, the park's longest span, measured roughly how wide in 2004?
290 feet
That makes it the fifth-longest natural arch in the world after four in China, and only about 6 feet thick at its thinnest point.
The name Devils Garden ended up on the opposite side of Salt Valley, where Landscape Arch is; his own discovery was left out of the 1929 monument entirely.
Q 14Which president's 1938 proclamation enlarged the monument to include Delicate Arch?
Franklin D. Roosevelt
The 1929 monument covered only the Windows and Devils Garden; the arch that now symbolises Utah played no part in the original designation.
Q 15Which president substantially enlarged Arches National Monument in early 1969, just before leaving office?
Lyndon B. Johnson
Congress then trimmed the acreage back two years later while upgrading its status to a national park.
Q 16Delicate Arch appears on which of these?
Utah license plates
It was also on the postage stamp marking Utah's statehood centennial and carried the Olympic torch relay for the 2002 Salt Lake City Games.
Q 17How tall is the freestanding span of Delicate Arch?
52 feet
White-throated swifts nest in the top of it each summer; the 3-mile round-trip trail climbs 480 feet over open slickrock to reach it.
Q 18Local cowboys gave Delicate Arch which unflattering nickname?
The Schoolmarm's Bloomers
It was also called the Chaps, Pants Crotch and Salt Wash Arch before Frank Beckwith's 1933–34 scientific expedition settled on the current name.
Q 19In the 1950s the Park Service seriously investigated protecting Delicate Arch from erosion by doing what?
Coating it in clear plastic
The idea was dropped as impractical and against Park Service principles; the arch will eventually fall like all the others.
Q 20Photographer Michael Fatali was fined $10,900 in 2000 after doing what beneath Delicate Arch?
Lighting a fire for a night-photo demo
He was showing amateurs a lighting technique using flaming logs; the fire scorched the sandstone and the money paid for the clean-up.
Q 24What happened at Landscape Arch in September 1991 that led to the trail beneath it being closed?
A 60-foot slab fell from its underside
The span went from about 11 feet thick to about 6 in seconds; two more large rockfalls followed in 1995.
Q 25Which formation, the park's 12th largest span, collapsed unobserved on the night of 4–5 August 2008?
Wall Arch
The rubble temporarily blocked the Devils Garden Trail; it was the first major arch collapse since the 1991 rockfall at Landscape Arch.
Q 26Double Arch formed differently from most spans in the park. How was it eroded?
From above, by water pooling in potholes
Water pooling on top of the fin cut downward until it met a cavity below; its larger opening is 104 feet high, the tallest in the park.
Q 27Double Arch and Balanced Rock both appear in the opening scene of which 1989 film?
Indiana Jones and the Last Crusade
Young Indy is chased through the formations; the cave shown in the film does not exist.
Q 28Balanced Rock, the largest of its kind in the park, weighs approximately how much?
About 3,600 tons
The 55-foot boulder of hard Slick Rock sandstone sits on a pedestal of softer Dewey Bridge mudstone that erodes faster, so it will eventually topple.
Q 29Balanced Rock once had a smaller companion that toppled in the winter of 1975–76. What was it called?
Chip Off the Old Block
The same recipe did it in: a hard caprock perched on a softer, faster-eroding base.
Q 30The Fiery Furnace takes its name from what?
Its reddish glow at sunset
The maze of fins and slots is also a biblical nod (Daniel chapter 3); it hides arches with names like Skull, Surprise and Kissing Turtles.