The California gold rush (1848–1855) was a gold rush in California, which began on January 24, 1848, when gold was found by James W. Marshall at Sutter's Mill in Coloma, California. The news of gold brought approximately 300,000 people from the rest of the United States and abroad to California, which had recently been conquered from Mexico. The sudden influx of gold into the money supply reinvigorated the American economy; the sudden population increase allowed California to grow rapidly into statehood in the Compromise of 1850. The gold rush had severe effects on Native Californians and accelerated the Native American population's decline from factors including disease, starvation, and according to certain sources, acts of unprovoked aggression.
The effects of the gold rush were substantial. The arrival of large numbers of "forty-niners" (referring to 1849, the peak year for gold rush immigration) led to significant conflict between the newcomers and indigenous people, eventually resulting in whole tribes being displaced in some cases. Outside of California, the first to arrive were from Oregon, Hawaii, and Latin America in late 1848. Of the approximately 300,000 people who came to California during the gold rush, about half arrived by sea and half came overland on the California Trail and the California Road; forty-niners often faced substantial hardships on the trip. While most of the newly arrived were Americans, the gold rush attracted thousands from Latin America, Europe, Australia, and China. Agriculture and ranching expanded throughout the state to meet the needs of the settlers. San Francisco grew from a small settlement of about 200 residents in 1846 to a boomtown of about 36,000 by 1852. Roads, churches, schools and other towns were built throughout California. In 1849, a state constitution was written. The new constitution was adopted by referendum vote; the future state's interim first governor and legislature were chosen. In September 1850, California achieved statehood.
At the beginning of the gold rush, there was no law regarding property rights in the goldfields and a system of "staking claims" was developed. Prospectors retrieved the gold from streams and riverbeds using simple techniques, such as panning. Although mining caused environmental harm, more sophisticated methods of gold recovery were developed and later adopted around the world. New methods of transportation developed as steamships came into regular service. By 1869, railroads were built from California to the eastern United States. At its peak, technological advances reached a point where significant financing was required, increasing the proportion of gold companies to individual miners. Gold worth tens of billions of today's US dollars was recovered, which led to great wealth for a few, though many who participated in the California gold rush earned little more than they had started with.
History
Earlier discoveries
Gold was discovered in California as early as March 9, 1842, at Rancho San Francisco, in the mountains north of present-day Los Angeles. Californian native Francisco Lopez was searching for stray horses and stopped on the bank of a small creek (in today's Placerita Canyon), about 3 miles (4.8 km) east of present-day Newhall, and about 35 miles (56 km) northwest of Los Angeles. While the horses grazed, Lopez dug up some wild onions and found a small gold nugget in the roots among the bulbs. He looked further and found more gold. Lopez took the gold to authorities who confirmed its worth. Lopez and others began to search for other streambeds with gold deposits in the area. They found several in the northeastern section of the forest, within present-day Ventura County. In November, some of the gold was sent to the U.S. Mint, but otherwise attracted little notice. In 1843, Lopez found gold in San Feliciano Canyon near his first discovery. Mexican miners from Sonora worked the placer deposits until 1846. Minor finds of gold in California were also made by Mission Indians prior to 1848. The friars instructed them to keep its location secret to avoid a gold rush.
Marshall's discovery
In January 1847, nine months into the Mexican–American War, the Treaty of Cahuenga was signed, leading to the resolution of the military conflict in Alta California (Upper California). On January 24, 1848, James W. Marshall found shiny metal in the tailrace of a lumber mill he was building for Sacramento pioneer John Sutter—known as Sutter's Mill, near Coloma on the American River. Marshall brought what he found to Sutter, and the two privately tested the metal. After the tests showed that it was gold, Sutter expressed dismay, wanting to keep the news quiet because he feared what would happen to his plans for an agricultural empire if there were a gold rush in the region. The Mexican–American War ended on May 30 with the ratification of the Treaty of Guadalupe Hidalgo, which formally transferred California to the United States.
Having sworn all concerned at the mill to secrecy, in February 1848, Sutter sent Charles Bennett to Monterey to meet with Colonel Mason, the chief U.S. official in California, to secure the mineral rights of the land where the mill stood. Bennett was not to tell anyone of the discovery of gold, but when he stopped at Benicia, he heard talk about the discovery of coal near Mount Diablo, and he blurted out the discovery of gold. He continued to San Francisco, where again, he could not keep the secret. At Monterey, Mason declined to make any judgement of title to lands and mineral rights, and Bennett for the third time revealed the gold discovery.
By March 1848, rumors of the discovery were confirmed by San Francisco newspaper publisher and merchant Samuel Brannan. Brannan hurriedly set up a store to sell gold prospecting supplies, and he walked through the streets of San Francisco, holding aloft a vial of gold, shouting "Gold! Gold! Gold from the American River!"
On August 19, 1848, The New York Herald was the first major newspaper on the East Coast to report the discovery of gold. On December 5, 1848, US president James K. Polk confirmed the discovery of gold in an address to Congress. As a result, individuals seeking to benefit from the gold rush—later called the "forty-niners"—began moving to the Gold Country of California or "Mother Lode" from other countries and from other parts of the United States. As Sutter had feared, his business plans were ruined after his workers left in search of gold, and squatters took over his land and stole his crops and cattle.
San Francisco had been a tiny settlement before the rush began. When residents learned about the discovery, it at first became a ghost town of abandoned ships and businesses, but then boomed as merchants and new people arrived. The population of San Francisco increased quickly from about 1,000 in 1848 to 25,000 full-time residents by 1850. Miners lived in tents, wood shanties, or deck cabins removed from abandoned ships. There were no churches or religious services in the rapidly growing city, which prompted missionaries like William Taylor to meet the need, where he held services in the street, using a barrel head as his pulpit. Crowds would gather to listen to his sermons, and before long he received enough generous donations from successful gold miners and built San Francisco's first church.
Transportation and supplies
In what has been referred to as the "first world-class gold rush," there was no easy way to travel to California; forty-niners faced hardship and often death on the way. At first, most Argonauts, as they were also known, traveled by sea. From the East Coast, a sailing voyage around the tip of South America would take four to five months, and cover approximately 18,000 nautical miles (21,000 mi; 33,000 km). An alternative was to sail to the Atlantic side of the Isthmus of Panama, take canoes and mules for a week through the jungle, and then on the Pacific side, wait for a ship sailing for San Francisco. There was also a route across Mexico starting at Veracruz. The companies providing such transportation generated vast amounts of wealth among their owners, including the U.S. Mail Steamship Company, the federally subsidized Pacific Mail Steamship Company, and the Accessory Transit Company. Many gold-seekers took the overland route across the continental United States, particularly along the California Trail. Each of these routes had its own deadly hazards, from shipwreck to typhoid fever and cholera. In the early years of the rush, much of the population growth in the San Francisco area was due to steamship travel from New York City through overland portages in Nicaragua and Panama and then back up by steamship to San Francisco.
While traveling, many steamships from the eastern seaboard required the passengers to bring kits, which were typically full of personal belongings such as clothes, guidebooks, tools, etc. In addition to personal belongings, Argonauts were required to bring barrels full of beef, biscuits, butter, pork, rice, and salt. While on the steamships, travelers could talk to each other, smoke, fish, and engage in other activities depending on the ship they traveled. Still, the dominant activity held throughout the steamships was gambling, which was ironic, since segregation between wealth gaps was prominent throughout the ships. Everything was segregated between the rich and the poor. There were different levels of travel one could pay for to get to California. The cheaper steamships tended to have longer routes. In contrast, the more expensive ones would get passengers to California quicker. There were clear social and economic distinctions between those who traveled together, being that those who spent more money would receive accommodations that others were not allowed. They would do this with the clear intent to distinguish their higher class power over those that could not afford those accommodations.
Supply ships arrived in San Francisco with goods to supply the needs of the growing population. When hundreds of ships were abandoned after their crews deserted to go into the goldfields, many ships were converted to warehouses, stores, taverns, hotels, and one into a jail. As the city expanded and new places were needed on which to build, many ships were destroyed and used as landfills.
Other developments
Within a few years, there was an important but lesser-known surge of prospectors into far Northern California, specifically into present-day Siskiyou, Shasta and Trinity Counties. Discovery of gold nuggets at the site of present-day Yreka in 1851 brought thousands of gold-seekers up the Siskiyou Trail and throughout California's northern counties.
Settlements of the gold rush era, such as Portuguese Flat on the Sacramento River, sprang into existence and then faded. The gold rush town of Weaverville on the Trinity River today retains the oldest continuously used Taoist temple in California, a legacy of Chinese miners who came. While there are not many Gold Rush era ghost towns still in existence, the remains of the once-bustling town of Shasta have been preserved in a California State Historic Park in Northern California.
By 1850, most of the easily accessible gold had been collected, and attention turned to extracting gold from more difficult locations. Faced with gold increasingly difficult to retrieve, Americans began to drive out foreigners to get at the most accessible gold that remained. The new California State Legislature passed a foreign miners tax of twenty dollars per month ($770 per month as of 2025), and American prospectors began organized attacks on foreign miners, particularly Latin Americans and Chinese.
In addition, the huge numbers of newcomers were driving Native Americans out of their traditional hunting, fishing, and food-gathering areas. To protect their homes and livelihood, some Native Americans responded by attacking the miners. This provoked counter-attacks on native villages. The Native Americans, out-gunned, were often slaughtered. Those who escaped massacres were many times unable to survive without access to their food-gathering areas, and they starved to death. Novelist and poet Joaquin Miller vividly captured one such attack in his semi-autobiographical work, Life Amongst the Modocs.
Forty-niners
The first people to rush to the goldfields, beginning in the spring of 1848, were the residents of California themselves—primarily agriculturally oriented Americans and Europeans living in Northern California, along with Native Californians and some Californios (Spanish-speaking Californians; at the time, commonly referred to in English as simply 'Californians'). These first miners were sometimes entire families, of all ethnicities, in which everyone helped in the effort. Women and children were sometimes found panning next to the men. Some enterprising families set up boarding houses to accommodate the influx of men; in such cases, the women could bring in steady income while their husbands searched for gold.
Word of the gold rush spread slowly at first. The earliest gold-seekers were people who lived near California or people who heard the news from ships on the fastest sailing routes from California. The first large group of Americans to arrive were several thousand Oregonians who came down the Siskiyou Trail. Next came people from the Sandwich Islands, and several thousand Latin Americans, including people from Mexico, from Peru and from as far away as Chile, both by ship and overland. By the end of 1848, some 6,000 Argonauts had come to California.
Only a small number (probably fewer than 500) traveled overland from the United States that year. Some of these "forty-eighters", as the earliest gold-seekers were sometimes called, were able to collect large amounts of easily accessible gold—in some cases, thousands of dollars' worth each day. Even ordinary prospectors averaged daily gold finds worth 10 to 15 times the daily wage of a laborer on the East Coast. A person could work for six months in the goldfields and find the equivalent of six years' wages back home. Some hoped to get rich quick and return home, and others wished to settle in California.