California Gold Rush (1848-1855): The Rush That Built the West

The California Gold Rush began on 24 January 1848, when the carpenter James W. Marshall found gold at Sutter’s Mill on the American River. Over the next seven years about 300,000 people poured into California from across the United States and the world, the largest mass migration in American history up to that time. The rush turned San Francisco into a city, made California a state in 1850 and reshaped the economy of the West, while bringing devastation to California’s Native peoples.

California before gold

In 1848 California was a thinly settled province of Mexico, occupied by US forces during the Mexican-American War. Its population was made up of perhaps 150,000 Native Californians, around 7,000–10,000 Californios of Mexican descent and a few thousand American and European settlers.

One of the most powerful settlers was John Sutter, a Swiss-born entrepreneur who had founded New Helvetia, known as Sutter’s Fort, at the site of present-day Sacramento in 1839. Sutter relied heavily on Native labour and planned a farming and trading empire. In 1847 he hired Marshall, a carpenter from New Jersey, to build a water-powered sawmill at Coloma, on the South Fork of the American River, about 45 miles to the east.

Discovery at Sutter’s Mill

On the morning of 24 January 1848, while checking the mill’s tailrace, the channel carrying water away from the wheel, Marshall noticed shiny flakes in the water. Tests convinced him and Sutter that they were gold. Henry Bigler, a former member of the Mormon Battalion working at the mill, recorded the find in his diary. Nine days later, on 2 February, the Treaty of Guadalupe Hidalgo transferred California to the United States; neither side knew of the discovery.

Sutter tried to keep the news secret, but it leaked. In May 1848 Sam Brannan, a San Francisco merchant and Mormon leader who had stocked his store with mining supplies, walked through the town holding a bottle of gold dust and shouting about gold from the American River. Within weeks San Francisco was nearly deserted as men left for the diggings, and ships were abandoned in the harbour as crews deserted.

The world rushes in

News reached Oregon, Hawaii, Mexico, Chile and Peru by ship in 1848, and thousands came from those places first. In the eastern United States reports were doubted until President James K. Polk confirmed the discovery in his message to Congress on 5 December 1848, and an army courier displayed a tea caddy of Californian gold in Washington. Gold fever followed. In 1849 tens of thousands of Americans, the forty-niners, set out for California.

There were three main routes. Overland emigrants followed the California Trail, branching off the Oregon Trail, a journey of four to six months on which cholera killed many. Others sailed around Cape Horn, a voyage of about 18,000 miles that could take five to eight months. A faster but disease-ridden route went by ship to Panama, across the isthmus by canoe and mule, and by ship again to San Francisco.

The rush was global. Miners came from Mexico, Chile, Peru, France, Germany, Britain, Ireland, Australia and Hawaii. From 1852 Chinese immigrants arrived in large numbers, about 20,000 in that year alone; they called California Gam Saan, Gold Mountain.

Life in the diggings

The first miners worked placer deposits, loose gold in river gravels. A man could pan for gold with a shallow dish, but most used rockers, or cradles, and later long toms and sluices, wooden troughs that washed gravel and trapped heavy gold particles. In 1848 and 1849 an ordinary miner might gather an ounce of gold a day or more, many times the wage of a labourer in the East.

Mining camps sprang up with names such as Hangtown, Rough and Ready and You Bet. Without formal government, miners set their own rules for claims and justice, sometimes violent and summary. Prices were extremely high because almost everything had to be shipped in. Women were few at first, and many of those who came earned more by running boarding houses, laundries and restaurants than miners earned in the streams.

San Francisco grew from a village of about 1,000 people in early 1848 to roughly 25,000 by the end of 1849, a chaotic city of tents and wooden buildings repeatedly swept by fire. Merchants such as Levi Strauss, who arrived in 1853, and bankers such as Wells Fargo, founded in 1852, built lasting businesses supplying the miners.

Hostility to foreigners

As competition grew, many American miners turned on foreign rivals. In 1850 the new state legislature passed a Foreign Miners’ Tax of 20 dollars a month, aimed mainly at Mexicans and Latin Americans, which drove many off the goldfields before it was repealed in 1851. A new tax in 1852 targeted Chinese miners. Chinese workers faced violence and expulsions from camps, and Mexican and Chilean miners were attacked and robbed. Californios, too, lost much of their land in long legal battles under the Land Act of 1851.

African Americans also joined the rush, both free men seeking fortunes and enslaved people brought by Southern owners to work claims. Although California entered the Union as a free state, enforcement was uneven. In 1856 Biddy Mason, an enslaved woman taken to California by her owner, won her freedom and that of her family in a Los Angeles court, and later became a prominent landowner and philanthropist in the city.

Catastrophe for Native Californians

For California’s Native peoples, the gold rush was a disaster. Miners flooded their lands, destroying the fish, game and acorn harvests they depended on. Disease spread, and settlers and militias killed thousands. The 1850 Act for the Government and Protection of Indians allowed Native people, including children, to be held in forced labour. In January 1851 Governor Peter Burnett told the legislature that a war of extermination would continue until the Native race became extinct, and the state paid for militia expeditions against Native communities.

The Native population, roughly 150,000 around 1848, fell to about 30,000 by 1870. The historian Benjamin Madley has estimated that between about 9,500 and 16,000 Native Californians were killed outright between 1846 and 1873. In 2019 California’s governor formally apologised for the state’s role in this violence, which many historians describe as genocide.

Statehood and industrial mining

The flood of settlers made military rule unworkable. In September and October 1849 a convention at Monterey drafted a state constitution that banned slavery. Because admitting California as a free state would upset the balance between free and slave states, its application set off a fierce crisis in Congress. It was resolved by the Compromise of 1850, and California became the 31st state on 9 September 1850, without ever having been a territory.

By the mid-1850s most easily reached surface gold was gone, and the rush is usually said to have ended around 1855. Mining became an industry run by companies with capital. Hard-rock or quartz mining dug tunnels into gold-bearing veins, and hydraulic mining, introduced in 1853, blasted whole hillsides with high-pressure water jets. Hydraulic mining choked rivers with debris and flooded farms downstream until a federal court largely stopped it in 1884. Mercury used to capture gold still contaminates some streams.

The flood of Californian gold had effects far beyond the state. It added substantially to the world’s money supply in the 1850s and helped fuel trade and investment across the Atlantic and Pacific. It also inspired new rushes elsewhere: in 1851 Edward Hargraves, who had tried his luck in California, found gold near Bathurst in New South Wales, starting the Australian gold rushes, and later rushes followed in British Columbia, Nevada and, at the end of the century, the Klondike.

Myths and facts

It is often said that the forty-niners all struck it rich. In fact most did not, and many returned home with little. Neither Marshall nor Sutter profited: Sutter’s workers deserted, squatters overran his land and he died in 1880 still petitioning Congress for compensation, while Marshall died poor in 1885. Another myth is that the rush was mostly American. It was one of the most international migrations of the century.

By the numbers

Timeline

• 1848, 24 January: James Marshall finds gold at Sutter’s Mill, Coloma.
• 1848, 2 February: Treaty of Guadalupe Hidalgo signed; California passes to the US.
• 1848, May: Sam Brannan publicises the discovery in San Francisco.
• 1848, 5 December: President Polk confirms the gold discovery to Congress.
• 1849: The great migration of the forty-niners.
• 1849, September-October: The Monterey convention drafts a state constitution.
• 1850, 9 September: California becomes the 31st US state.
• 1852: Gold production peaks and Chinese immigration surges.
• 1855: The rush is generally considered over as surface gold runs out.

Why it matters

The California Gold Rush transformed a remote Mexican province into a populous American state within a few years and turned San Francisco into the gateway of the Pacific. It spurred the building of the transcontinental railroad, drew migrants from around the world and became a symbol of the American dream of sudden wealth. It also brought one of the darkest chapters in American history for California’s Native peoples, a loss now increasingly acknowledged.