Sutter's Mill in the context of "Water mill"

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 disease, starvation, and the California genocide.

The effects of the gold rush were substantial. Whole indigenous societies were attacked and pushed off their lands by the gold-seekers, nicknamed "forty-niners" (referring to 1849, the peak year for gold rush immigration). 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.

James Wilson Marshall (October 8, 1810 – August 10, 1885) was an American carpenter and sawmill operator, who on January 24, 1848, reported the finding of gold at Coloma, California, a small settlement on the American River about 36 miles northeast of Sacramento. His discovery was the impetus for the California gold rush. The mill property was owned by Johann (John) Sutter who employed Marshall to build his mill. The wave of gold seekers turned everyone's attention away from the mill which eventually fell into disrepair and was never used as intended. Neither Marshall nor Sutter ever profited from the gold find.

Coloma (Nisenan: Cullumah, meaning "beautiful") is a census-designated place (CDP) in El Dorado County, California, United States. It is approximately 36 miles (58 km) northeast of Sacramento. Coloma is most noted for being the site where James W. Marshall found gold in the Sierra Nevada foothills, at Sutter's Mill on January 24, 1848, leading to the California gold rush. Coloma's population is 521.

The settlement is a tourist attraction known for its ghost town and the centerpiece of the Marshall Gold Discovery State Historic Park. Coloma was designated a National Historic Landmark District on July 4, 1961.

The American River is a 30-mile-long (50 km) river in California that runs from the Sierra Nevada mountain range to its confluence with the Sacramento River in downtown Sacramento. Via the Sacramento River, it is part of the San Francisco Bay watershed. This river is fed by the melting snowpack of the Sierra Nevada and its many headwaters and tributaries, including its North, Middle, and South Forks.

The American River is known for the discovery of gold at Sutter's Mill in Coloma in 1848 that started the California Gold Rush and contributed to the initial large-scale settlement of California by white American migrants. Today, the river still has high quality water, and it is the main source of drinking water for Sacramento. This river is dammed extensively for irrigation, flood control, and hydroelectric power. The American River watershed supports Mediterranean, temperate, and montane ecosystems, and it is the home of a diverse array of fish and wildlife.

John Augustus Sutter (February 23, 1803 – June 18, 1880), born Johann August Sutter and known in Spanish as Don Juan Sutter, was a Swiss immigrant who became a Mexican and later an American citizen, known for establishing Sutter's Fort in the area that would eventually become Sacramento, California, the state's capital. His employee James W. Marshall discovered gold, leading to the founding of the mill-making team at Sutter's Mill. Sutter, however, saw his own business ventures fail during the California gold rush, though those of his elder son, John Augustus Sutter Jr., were more successful.