There was a time when traveling from the East Coast to the West Coast meant riding for months in a horse-drawn wagon or stagecoach, or sailing southward to Panama and then crossing the Isthmus to board another ship for a journey up the other coast. But that all changed on May 10, 1869, when railroad baron Leland Stanford whacked in a ceremonial gold spike to mark the joining together of the tracks of the Central Pacific Railroad and the Union Pacific Railroad in Promontory, Utah, to form the transcontinental railroad. The new rail connection eventually made it possible to travel in a train car from New York to San Francisco in just a week’s time.

Some 21,000 workers—from Irish-American Civil War veterans, freed slaves and Mormon pioneers to Chinese laborers—had been recruited to perform the hard and often dangerous work of laying the 1,776 miles of track. By one estimate, the project cost roughly $60 million, about $1.2 billion in today’s money, though other sources put the amount even higher.

While the railroad's construction was a mammoth undertaking, its effects on the country were equally profound. Here are some of the ways that the first transcontinental railroad—and the many other transcontinental lines that followed it—changed America.

1. It made the Western U.S. more important. 

“What the transcontinental railroad did was bring the West into the world, and the world into the West,” explains James P. Ronda, a retired University of Tulsa history professor and co-author, with Carlos Arnaldo Schwantes, of The West the Railroads Made. In particular, it helped turn California from a once-isolated place to a major economic and political force and helped lead to the state’s rapid growth.

2. It made commerce possible on a vast scale. 

By 1880, the transcontinental railroad was transporting $50 million worth of freight each year. In addition to transporting western food crops and raw materials to East Coast markets and manufactured goods from East Coast cities to the West Coast, the railroad also facilitated international trade.

The first freight train to travel eastward from California carried a load of Japanese tea. “The Constitution provided the legal framework for a single national market for trade goods; the transcontinental railroad provided the physical framework,” explains Henry W. Brands, a history professor at the University of Texas at Austin, and author of Dreams of El Dorado: A History of the American West. “Together they gave the United States the single largest market in the world, which provided the basis for the rapid expansion of American industry and agriculture to the point where the U.S. by the 1890s had the most powerful economy on the planet.”

3. It made travel more affordable. 

In the 1860s, a six-month stagecoach trip across the U.S. cost $1,000 (about $20,000 in today’s dollars), according to the University of Houston’s Digital History website. But once the railroad was built, the cost of a coast-to-coast trip became 85 percent less expensive. That made it possible for Americans to visit distant locales that previously they might only have heard about.

4. It changed where Americans lived. 

During the railroad’s construction, numerous temporary “hell on wheels” towns of tents and wooden shacks sprung up along the route to provide living quarters for workers. Most of them eventually disappeared, but others, such as Laramie, Wyoming, evolved into towns that provided rail terminals and repair facilities.

Approximately 7,000 cities and towns across the country began as Union Pacific depots and water stops. And, as Ronda notes, the first transcontinental railroad and the other lines that followed made it easy for immigrants to spread across the nation. “People come across the Atlantic on ships, get on trains, and end up in places such as western Nebraska,” he says.

5. It altered Americans’ concept of reality. 

Construction of the Transcontinental Railroad
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Construction of the Union Pacific section of the Transcontinental Railroad across Devil's Gate Bridge, Utah, circa 1869.

In an 1872 article, naturalist John Muir wrote that the transcontinental railroad “annihilated” time and space. As Ronda explains, it changed the way that people viewed distances. “When you’re walking or riding a horse, you experience the world one way, but when you’re sitting in a railroad car, you see it differently,” he says. “In the West, where the distances are so great, the railroad brought near and far closer together.” The railroad schedules also helped to push the United States into changing how it marked time, leading to the adoption of standard time zones in 1883.

6. It helped create the Victorian version of Amazon. 

In 1872, just a few years after the transcontinental railroad’s completion, Aaron Montgomery Ward started the first mail-order catalog business. As Ronda notes, the first transcontinental railroad—and other transcontinental lines that followed—made it possible to sell products far and wide without a physical storefront, and enabled people all over the country to furnish their homes and keep up with the latest fashion trends.

7. It took a heavy toll on the environment. 

The massive amount of wood needed to build the railroad, including railroad ties, support beams for tunnels and bridges, and sheds, necessitated cutting down thousands of trees, which devastated western forests. Towns and cities that sprung up along the railroad further encroached upon what had been wild areas. And the railroad and other rail routes that followed made it easy for large numbers of hunters to travel westward and kill millions of buffalo. That slaughter impacted Native Americans, who had hunted buffalo in moderation, and weakened their resistance to settlement of the west.

8. It increased racial conflicts. 

The completion of the transcontinental railroad led to heightened racial tensions in California, as white workers from the East Coast and Europe could more easily travel westward where immigrant laborers were prevalent, says Princeton University Assistant Professor of History Beth Lew-Williams, author of The Chinese Must Go: Violence, Exclusion, and the Making of the Alien in America. 

Upon completion of the railroad, many Chinese workers returned to California in search of employment. “The flood of goods and laborers who arrived in the West, combined with the boom and bust economy of the late-19th century, put pressure on the labor market," she says. "The presence of Chinese immigrants did not create the economic uncertainties of the 1870s, but they were often blamed nonetheless.” 

Growing prejudice against and fear of the Chinese eventually manifested itself in Congress’ passage of the Chinese Exclusion Act of 1882, the first of several laws that blocked Chinese laborers from entering the United States until 1943.

9. It pioneered government-financed capitalism. 

The Central Pacific’s “Big Four”—Stanford, Collis P. Huntington, Mark Hopkins, and Charles Crocker—figured out how to tap into government coffers to finance a business that otherwise wouldn’t have been possible. As Richard White, author of Railroaded: The Transcontinentals and the Making of Modern America, says, “They put little of their own money in it —they didn’t have much. It was built on land grants, government loans, and government-guaranteed bonds. When their loans came due, they refused to pay and the government had to sue. In effect, they stumbled into a business model where the public takes the risk and those taking the subsidies reap the gain.” 

Other entrepreneurs and industries would follow the Big Four’s lead in tapping government help to build their businesses.

10. It instilled national confidence. 

The transcontinental railroad had a major effect on how Americans perceived their nation, and it became a symbol of America’s growing industrial power and a source of confidence that led them to take on even more ambitious quests. As Ronda says, “It’s one of the transformative moments in American history.”

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