50 free Pinnacles National Park trivia questions with answers — geography quiz, new questions added Aug 2026.
This Pinnacles National Park trivia quiz covers the central California park of eroded volcanic spires that Theodore Roosevelt made a national monument in 1908 and Congress finally upgraded to a national park in 2013. It ranges across the geology (the park is the western half of a volcano that the San Andreas Fault carried 195 miles north), the talus caves at Bear Gulch and the Balconies, the East and West sides that no road connects, and the wildlife, from prairie falcons and 13 bat species to the world's densest bee fauna. There is plenty of history and conservation too: the Ohlone people, the homesteader Schuyler Hain whose tours and lobbying created the monument, the CCC crews of the 1930s, the 20-year war on feral pigs and the California condor release programme that began here in 2003. Questions run from easy to expert with the difficulty shown on each one, so it works for a Bay Area day-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 it, try our Yosemite, Sequoia and US National Parks quizzes next.
30 of 50 questions with answers and explanations. Play the quiz
Q 01Pinnacles National Park is in which U.S. state?
California
It sits about 80 miles southeast of San Jose and 40 miles inland from the Pacific.
Q 02The park's rock spires are the eroded remains of what?
An extinct volcano
Only the western half is here; the eastern half sits near Lancaster, roughly 200 miles to the southeast.
Q 03Which famous fault carried the park's rocks some 195 miles northwest from where they erupted?
San Andreas
The fault itself has since shifted about four miles east of the park; its old line is visible as the Chalone Creek fault.
Q 04What is the name of the long-dead volcano, near present-day Lancaster, that the park's rocks came from?
Neenach
Ten rock types match in the same order at both sites, which made the pair a textbook example of plate tectonics.
Q 05Roughly how long ago did that volcano erupt?
About 23 million years ago
The fault has moved the two halves apart at about 1.5 centimetres a year, roughly six inches a decade.
Q 06Which president made Pinnacles a national monument in 1908?
Theodore Roosevelt
The chief forester suggested using the brand-new Antiquities Act; the first monument was just 2,080 acres.
Q 07In what year did Pinnacles become a national park?
2013
Rep. Sam Farr wrote the bill; it made Pinnacles the ninth national park in its state.
Q 08Which president signed the law making Pinnacles a national park?
Barack Obama
Bill Clinton had already added 7,900 acres and more caves to the monument in 2000.
Q 09Which homesteader's name did the 2013 law attach to its wilderness?
Schuyler Hain
Hain arrived from Michigan in 1891, ran the Bear Valley post office and led cave tours to drum up support for protection.
Q 10Which two groups of the Ohlone people lived in the Pinnacles region before the Spanish arrived?
Chalon and Mutsun
Thirteen native sites have been found in the park, one about 2,000 years old; the last Chalon were gone by 1810.
Q 11Before the 1890s the formations were known locally by what name?
The Palisades
Newspaper articles between 1889 and 1891 gradually switched to the current name.
Q 12Which Stanford geologist's admiring visit in 1893 inspired the local campaign to publicise the Pinnacles?
G. K. Gilbert
A 1904 visit by Stanford president David Starr Jordan then pulled in a congressman and the chief forester.
Q 13Why was the name 'Vancouver's Pinnacles', used from 1903 to 1955, dropped?
The peak in the sketch was actually near Fort Ord
Q 21Which raptor breeds in the park at some of the highest densities anywhere in North America?
Prairie falcon
Peregrines have returned to breed too, but in far smaller numbers.
Q 22A 1990s census found the park has more of what insect per unit area than anywhere else known on Earth?
Bees
Around 450 species, mostly solitary bees that live just three or four weeks each.
Q 23Which invasive animal was eradicated from the park's core by 2006 after a 20-year, $1.6 million campaign?
Wild pigs
A 26-mile exclusion fence still rings the core, and hikers on the South Wilderness Trail haul themselves up 'The Pig Fence'.
Hain had convinced himself the spires were the 'extraordinary mountain' pictured by John Sykes on the Vancouver Expedition.
Q 14What geological term describes the park's caves, formed when boulders wedged into narrow gorges?
Talus
The east-side and west-side caves are both open seasonally, and trails run right through them.
Q 15Which cave on the park's east side is seasonally open, along with Balconies Cave on the west?
Bear Gulch
Both close during bat pupping season and can flood in high water.
Q 16Roughly how many bat species have been documented in the park?
13
The caves are breeding sites for Townsend's big-eared bats, which is why they close during pupping.
Q 17Which endangered bird has been released at Pinnacles under a programme running since 2003?
California condor
The first wild nest since reintroduction was built in 2010, and the park now manages about 25 free-flying birds.
Q 18The condor has the widest wingspan of any North American bird; roughly how wide?
About 10 feet
They are so big they are sometimes mistaken for small, distant aeroplanes.
Q 19In what year was the last wild condor captured, leaving the species extinct in the wild?
1987
Only 27 birds existed at that point; every condor alive today descends from 22 founders.
Q 20What is the leading cause of death among adult and juvenile wild condors?
Lead poisoning
The state's 2008 Ridley-Tree Act requires hunters in condor country to use non-lead ammunition.
Q 24Roughly how long is the exclusion fence that keeps feral pigs out of the park's core?
26 miles
Outside the fence, the animals still roam the surrounding ranch country.
Q 25How are the park's East and West Divisions connected?
Only by foot trails
Roads approach from the west and from south of Hollister on the east but never meet.
Q 26Which town about five miles west is the gateway to the park's West side?
Soledad
A Spanish mission at Soledad hastened the decline of the local Ohlone in the 18th century.
Q 27Which mountains, part of the state's Coast Ranges, hold the park?
Gabilan
The Santa Lucias stand between the park and the ocean, blocking the sea's moderating effect on temperatures.
Q 28What is the highest point in the park, at 3,304 feet?
North Chalone Peak
A CCC fire lookout stood on Chalone Peak from 1935 until fire destroyed it in 1951.
Q 29Roughly what share of the park is designated wilderness?
More than 80%
Congress added it to the National Wilderness Preservation System in 1976.
Q 30Which endangered amphibian lives in the creeks and canyons of the park's wilderness?
Red-legged frog
Mark Twain's celebrated jumping frog of Calaveras County was this same species.