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50 free Transcontinental Railroad trivia questions with answers — trivia quiz, new questions added Aug 2026.
The first transcontinental railroad stitched Omaha to Sacramento in six years of blasting, tunnelling and track-laying, and ended with a gold spike and a one-word telegram. These 50 questions cover how it was financed, who built it, where the two lines met and what the whole thing changed. Expect the famous names (Stanford, Durant, Judah) but also the details teachers and trivia hosts love: the ten-mile day, the Chinese crews who carved the Sierra tunnels, the checkerboard land grants and the Crédit Mobilier scandal that followed. Every answer is sourced so you can use it in class, at a pub quiz or just to settle an argument.
30 of 50 questions with answers and explanations. Play the quiz
Q 01In which year was the first transcontinental railroad completed?
1869
The Central Pacific and Union Pacific met at Promontory Summit on May 10, 1869, six years after ground was broken in Sacramento.
Q 02At which Utah Territory location did the two railroads meet?
Promontory Summit
The site became Golden Spike National Historic Site in 1957 and was redesignated a National Historical Park in 2019.
Q 03Who ceremonially drove the golden Last Spike?
Leland Stanford
Stanford, president of the Central Pacific, tapped the spike with a silver hammer; accounts say he and David Hewes actually missed it.
Q 04Which president signed the Pacific Railroad Act of 1862 into law?
Abraham Lincoln
Lincoln signed it on July 1, 1862, once southern secession had removed the opposition that killed earlier bills.
Q 05What one-word telegraph message announced the line's completion?
DONE
The hammers and spike were wired to the telegraph so each stroke would click at stations nationwide; operators ended up sending the clicks by hand.
Q 06Roughly how long was the continuous line from Council Bluffs to San Francisco Bay?
1,911 miles
Three companies built it: Western Pacific (132 miles), Central Pacific (690) and Union Pacific (1,085).
Q 07Which Central Pacific locomotive took part in the Last Spike ceremony?
Jupiter
Central Pacific No. 60 Jupiter faced Union Pacific No. 119, both 4-4-0 types built in 1868.
Q 08What number did the Union Pacific locomotive at the ceremony carry?
No. 119
Replicas of No. 119 and the Jupiter are fired up by the National Park Service at the Promontory site.
Q 09Which group of workers laid the Central Pacific's last two rails at Promontory?
Chinese
The Union Pacific's final rails were laid by Irishmen; the Central Pacific's by Chinese crews, who did most of its heavy manual labor.
Q 10What did the Central Pacific's workers from China commonly get called at the time?
Celestials
China itself was referred to as the "Celestial Kingdom"; the railroad even set up recruiting in Canton once the crews proved themselves.
Q 11Which Big Four member initially doubted the laborers from China were big enough for the work?
Charles Crocker
After a short trial Crocker reversed course and hired as many Chinese workers as he could find.
Q 12Who served as treasurer among the Central Pacific's Big Four?
Mark Hopkins
Stanford was president, Huntington vice president, Hopkins treasurer and Crocker construction supervisor.
Q 13Which engineer surveyed the Sierra route and lobbied Congress for the railroad?
Theodore Judah
Judah was chief engineer of the Sacramento Valley Railroad in 1852, the first railroad west of the Mississippi.
Q 21On what date did the Central Pacific break ground in Sacramento?
January 8, 1863
Governor Leland Stanford turned the first earth; nearly every tool and rail had to be shipped around Cape Horn or via Panama.
Q 22The Central Pacific crossed the Sierra over which pass?
Donner
The line climbed from 40 feet at Sacramento to roughly 7,000 feet at the summit in about 90 miles.
Q 23How long was the Central Pacific's Summit Tunnel (Tunnel No. 6)?
1,660 feet
Through solid granite, progress was only about a foot per day per face, so a 125-foot vertical shaft was sunk to open two more faces.
Q 14What disease killed the Central Pacific's original chief engineer in 1863?
Yellow fever
He caught it crossing the Isthmus of Panama on his way to New York to raise money to buy out the Big Four.
Q 15What was Union Pacific financier Thomas "Doc" Durant's former profession?
Ophthalmologist
Durant was nominally only a vice president but ran the company, installing figureheads like John Adams Dix as president.
Q 16Which Union general served as Union Pacific's chief engineer during construction?
Grenville Dodge
Dodge found a pass through the Laramie Mountains in 1865 while fighting Native American tribes; it became part of the route.
Q 17Which scandal over inflated construction contracts ensnared Union Pacific figures?
Crédit Mobilier
Crédit Mobilier charged Union Pacific often twice the customary rate for track work; Durant was eventually removed from the company.
Q 18How much per mile did the government pay in bonds for track laid on level ground?
$16,000
The rate doubled to $32,000 in the foothills and tripled to $48,000 in the mountains, an incentive to call terrain mountainous.
Q 19Land grants to the railroads were laid out in what pattern?
Checkerboard
Railroads got the odd-numbered sections and the government kept the even ones, for 10 miles on each side of the track.
Q 20The combined land grants to the two railroads were larger than which state?
Texas
Federal grants totaled about 130 million acres, with state grants adding roughly 50 million more.
Q 24What newly invented explosive sped up Union Pacific tunnelling in Weber Canyon?
Nitroglycerin
It expedited the work but caused some fatal accidents; most rock was still broken with black powder.
Q 25How far did the timber snow sheds on the Sierra grade stretch?
37 miles
Built between Blue Cañon and Truckee from 1867, the sheds used 2,500 men and six material trains and were finished in 1869.
Q 26How much track did the Central Pacific lay in its record day of April 1869?
10 miles
The push on April 28, 1869, settled a $10,000 bet and inspired the children's book Ten Mile Day.
Q 27What were the mobile tent towns that followed the Union Pacific railhead nicknamed?
Hell on Wheels
The name later became the title of an AMC drama in which Colm Meaney played Thomas Durant.
Q 28Which river valley did the Union Pacific follow west across Nebraska?
Platte
The valley rose only about 6 feet per mile, letting crews lay a mile of track a day or more in 1866.
Q 29Which Wyoming railroad town became a major Union Pacific center at 6,070 feet elevation?
Cheyenne
Cheyenne sat 35 miles from Evans Pass and was linked to Denver by a connecting line in 1870.
Q 30Which religious leader contracted with Union Pacific to supply around 2,000 workers?
Brigham Young
Mormon workers also signed the Thousand Mile Tree in Weber Canyon, a lone tree 1,000 miles from Omaha.