James Marshall's discovery at Sutter's Mill triggers the California Gold Rush. Miners flood the American River watershed, displacing Indigenous communities and transforming the landscape almost overnight.
French prospector Claude Chana discovers gold along what is now known as Auburn Ravine — just months after James Marshall's famous discovery at Sutter's Mill. The find draws a flood of miners to the area, giving birth to the settlement that would become Auburn and setting the stage for the formation of Placer County itself three years later.
When the California Gold Rush began, some of the earliest prospectors to explore the opportunity were rugged mountain men and explorers poised to pursue new adventures. Those who were already in the California territory at the time of the gold discovery were even more prepared to join the rush and seek the golden treasure. Among these iconic pioneers was Jean Baptiste Charbonneau who had guided the Mormon Battalion into California in 1846-47 during the height of the Mexican-American War. He was then appointed alcalde of the San Luis Rey Mission, witnessing firsthand California’s transition to a United States territory. As the son of Sacagewea, Charbonneau was just an infant when he accompanied his mother on the famed expedition of Lewis and Clark in 1805 to investigate the territory acquired by the United States during the Louisiana Purchase. Constantly on the move, Charbonneau traveled Europe and Africa and spent much of his life as an explorer, guide and fur trapper throughout the western U.S., benefitted by speaking German, French, Spanish and several indigenous languages. Charbonneau was already a legend when he arrived in what would become Placer County in June of 1849, along with another famed mountain man named Jim Beckwourth. It is in Placer County that Charbonneau then spent the longest period of his life in one place. In 1852 Charbonneau was paid $48 by the Placer County Board of Supervisors for guiding the county’s surveyor. In 1857, he petitioned and was approved by the Board to operate a ferry across the North Fork of the American River at Manhattan Bar. By 1861, at 56 years old, Charbonneau was the clerk at the Orleans Hotel in Auburn. In 1866, the lure of a new gold strike in Montana lifted his roots once again and Charbonneau left Placer County behind. This would be the last adventure for this historic figure as he contracted pneumonia and died in Oregon en route to Montana and was buried near Inskip Station.
California enters the Union. The surge of Gold Rush settlement creates pressure to organize the region's booming population into formal governance.
By the 1860s, the California Gold Rush had shifted from a rush for riches to a period of settlement and steady growth. Mining ditches became commercial water systems, companies paid regular wages and many settlers turned to agriculture and other industries. The history of the Traveler’s Rest reflects this transition. Built in 1851 by George Bishop and John Long, the two-story inn served as a stage stop along the main route from Sacramento to Folsom and Auburn along the American River. Though not the only roadhouse, it remains one of the oldest known buildings still standing in Placer County. Popular with travelers and teamsters, the hotel expanded in 1856 with a one-story addition. By 1858, it became a private residence as its owners struggled financially. Court records show they borrowed from Eliza Caruthers, who sued over unpaid debts in 1861. After continued financial strain, the property was sold at a sheriff’s sale in 1864, where Caruthers purchased it for $4,772.71. Caruthers, widowed in 1857 after her husband died in a mining accident, had briefly traveled to the East Coast aboard the SS Central America. The ship, carrying tons of California gold and hundreds of passengers, sank in a hurricane off the Carolinas. Caruthers survived, though hundreds perished. After acquiring the property, she managed the 30-acre site, which included a vineyard and orchard, before selling it in 1868 to Bernhard Bernhard, a former teamster. With the arrival of the railroad, Bernhard expanded the property into a productive 130-acre agricultural operation. Today, the former Traveler’s Rest is preserved as the Bernhard Museum and is open six days a week with free admission. Plan your visit today at https://www.placer.ca.gov/10497/Museums
Learn more about Placer County's origin.
In Placer County's first election, Samuel C. Astin is elected as the county's first Sheriff — launching one of California's oldest continuously operating law enforcement agencies. Today the Sheriff-Coroner-Marshal's Office serves a county of more than 400,000 residents, patrolling territory stretching from the Sacramento Valley to the Nevada border at Lake Tahoe.
Placer miners in Auburn Ravine were using the Long Tom in 1852 — an elongated sluice device that improved on the basic gold pan and cradle rocker by processing far greater volumes of gravel. While not invented exclusively in Placer County, the gold fields of Placer County were among the first places it was refined and widely adopted.
It is claimed that water was used under pressure at Yankee Jim's in Placer County in 1852, making it one of the earliest documented uses of hydraulic mining in California. History Colonel William McClure formally introduced hydraulic mining to the Yankee Jim's area in June 1853. CA This technique — blasting hillsides with high-pressure water jets to extract gold from ancient gravel beds — was adopted around the world and revolutionized industrial mining. It was one of the most consequential mining innovations of the 19th century, though it also caused enormous environmental damage that ultimately led to its prohibition in California in 1884.
The Placer County Big Trees Grove is the smallest and northernmost naturally occurring giant sequoia grove in the world. Its history spans two millennia, from ancient seedlings to a post-WWI memorial. In 1855, prospector Joseph Matlock discovers the grove while searching for gold near Foresthill.
