Title: Northern California
Content:  The California Gold Rush took place almost exclusively in northern California from 1848 to 1855. It began on January 24, 1848, when gold was discovered at Sutter's Mill in Coloma. News of the discovery soon spread, resulting in some 300,000 people coming to California from the rest of the United States and abroad. San Francisco grew from a tiny hamlet, home to about 1,000 Californios into a boomtown of over 50,000 people in the 12 years between 1848 and 1860. New roads, churches, and schools were built, and new towns sprung up, aided in part by the development of new methods of transportation such as steamships which came into regular service and railroads which now connected the coasts. The Gold 
Title: History of California before 1900
Content:  In January 1848, gold was discovered at Sutter's Mill in the Sierra Nevada foothills about 40 miles east of Sacramento – beginning the California Gold Rush, which had the most extensive impact on population growth of the state of any era. The miners settled in towns along what is now California State Highway 49, and settlements sprang up along the Siskiyou Trail as gold was discovered elsewhere in California (notably in Siskiyou County). The nearest deep-water seaport was San Francisco Bay, and the rapidly growing town of San Francisco became the home for bankers who financed exploration for gold. The Gold Rush brought the world to California. By 1855, some 300,000 "Forty-Niners" had arrived from every continent; many soon left, of course—some rich, most not so fortunate. A precipitous drop in the Native American population occurred in the decade after the discovery of gold.
Title: California Gold Rush
Content:  The California Gold Rush (1848–1855) was a gold rush that 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 to California from the rest of the United States and abroad. The sudden influx of gold into the money supply reinvigorated the American economy, and the sudden population increase allowed California to go rapidly to statehood, in the Compromise of 1850. The Gold Rush had severe effects on Native Californians and accelerated the Native American population's decline from disease, starvation and the California genocide. The effects of the Gold Rush 
Title: Gold rush
Content:  The first significant gold rush in the United States was in Cabarrus County, North Carolina (east of Charlotte), in 1799 at today's Reed's Gold Mine. Thirty years later, in 1829, the Georgia Gold Rush in the southern Appalachians occurred. It was followed by the California Gold Rush of 1848–55 in the Sierra Nevada, which captured the popular imagination. The California gold rush led directly to the settlement of California by Americans and the rapid entry of that state into the union in 1850. The gold rush in 1849 stimulated worldwide interest in prospecting for gold, and led to new rushes in Australia, South Africa, Wales and Scotland. Successive gold rushes occurred in western North America: Fraser Canyon, the Cariboo district and other parts of British Columbia, in Nevada, in the Rocky Mountains in Colorado, Idaho, Montana, eastern Oregon, and western New Mexico Territory and along 
Title: California Gold Rush
Content:  The Chinese Question: The Gold Rushes and Global Politics (2021), Mid 19c in California, Australia and South Africa Lienhard, Heinrich. "Wenn Du absolut nach Amerika willst, so gehe in Gottesnamen!", Erinnerungen an den California Trail, John A. Sutter und den Goldrausch 1846–1849. Herausgegeben von [edited by] Christa Landert, mit einem Vorwort von [foreword by] Leo Schelbert. Zürich: Limmat Verlag, 2010, 2011. ISBN: 978-3-85791-504-8 ; Ngai, Mae. The Chinese Question: The Gold Rushes and Global Politics (2021), Mid 19c in California, Australia and South Africa Lienhard, Heinrich. "Wenn Du absolut nach Amerika willst, so gehe in Gottesnamen!", Erinnerungen an den California Trail, John A. Sutter und den Goldrausch 1846–1849. Herausgegeben von [edited by] 
Title: Gold mining in the United States
Content:  Spanish prospectors found gold in the Potholes district between 1775 and 1780, along the Colorado River, in present Imperial County, California, about ten miles northeast from Yuma, Arizona. The gold was recovered from dry placers. Other placer deposits on the west bank of the Colorado River were quickly found, including the Picacho and Cargo Muchacho districts. Placer gold deposits were found at San Ysidro in San Diego County in 1828, San Francisquito Canyon and Placerita Canyon in Los Angeles County in 1835 and 1842, respectively  Major gold mining in California began during the California Gold Rush. Gold was found by James Marshall at Sutters Mill, 
Title: Mariposa War
Content:  The cause of the conflict was the California Gold Rush. After the discovery of gold in January 24, 1848, an overland route very quickly developed southward to Sutter's Mill from the Oregon Trail at Fort Hall in Oregon Country (now Idaho). By the end of May 1849, more than 40,000 gold seekers had used the California Trail to enter northern and central California which had been up until then populated by Native Americans and Californios (the descendants of early Spanish settlers). In three years, the non-Native American population rose from 14,000 in 1848 to 200,000 in 1852. Immigrants had come from Mexico, South America, Europe, Australia, and China. Miners searching for gold forced Native Americans off their historic lands. Many others were pressed into service in the mines; others had their villages raided by the army and volunteer militia. In December 1850, the Ahwahneechees and the Chowchilla in the Sierra Nevada and San Joaquin Valley fought back leading a raid on the Fresno River post of James D. Savage. In retaliation Mariposa County Sheriff James Burney led local militia in an indecisive clash with some Native Americans on a mountainside near present-day Oakhurst, California on January 11, 1851.
Title: Gold rush
Content: Holcomb Valley Gold Rush, California (1860–61) ; Clearwater Gold Rush, Idaho (1860) ; Central Otago Gold Rush, New Zealand (1861) ; Eldorado Canyon Rush, New Mexico Territory (present-day Nevada; 1861) ; Colorado River Gold Rush, Arizona Territory (1862–64) ; Boise Basin Gold Rush, Idaho (1862) ; Cariboo Gold Rush, British Columbia (1862–65) ; Montana Gold Rush (1862–69), including: ; Bannack, Virginia City (Alder Gulch), and Helena (Last Chance Gulch) (1862–64) ; Confederate Gulch (1864–69) ; Stikine Gold Rush, British Columbia (1863) ; Owyhee Gold Rush, Southeastern Oregon, Southwestern Idaho (1863) ; Owens Valley Rush, Owens Valley, California (1863–64) ; Leechtown Gold Rush, (south of Sooke Lake), Leech River, Vancouver Island (1864–65) ; West Coast Gold Rush, South Island, New Zealand (1864–67) ; Big Bend Gold Rush, British Columbia (1865—66) ; Francistown Gold Rush, British Protectorate of Bechuanaland (1867) ; Omineca Gold Rush, British Columbia (1869) ; Wild Horse Creek Gold Rush, British Columbia (1860s) ; Eastern Oregon Gold Rush (1860s–70s) ; Kildonan Gold Rush, Sutherland, Scotland (1869) 
Title: History of California
Content:   The first to hear confirmed information of the California Gold Rush were the people in Oregon, the Sandwich Islands (Hawaii), Mexico, Peru, and Chile. They were the first to start flocking to the state in late 1848. By the end of 1848, some 6,000 Argonauts had come to California. Americans and foreigners of many different countries, statuses, classes, and races rushed to California for gold. Almost all (c. 96%) were young men. Women in the California Gold Rush were few and had many opportunities to do new things and take on new tasks. Argonauts, as they were often called, walked over the California Trail 
Title: Squatters' riot
Content:  The California Gold Rush, which began in 1848, attracted thousands of gold seekers to the Sacramento Valley region after flakes of gold were discovered at a sawmill owned by John Sutter, Sr. in Coloma. Founding an embarcadero on the confluence of the American and Sacramento Rivers to facilitate trade, the Gold Rush made Sutter disillusioned and he replaced himself with his son as tender of business affairs in Sutter's New Helvetia. Sutter's temporary succession by his son gave Sutter, Jr. the power and opportunity to develop the embarcadero into a settlement that he dubbed "Sacramento City" with his partner, Samuel Brannan from San Francisco in the south. However, even after the hype that accompanied the Gold Rush 

Question: where did the california gold rush take place?
Answer: Northern California.
Sierra Nevada.