Gold Country

When gold was first discovered in 1848, prospectors arrived from around the world. The migration into California also brought diseases and violence. Approximately 500 mining camps were established, of which 300 remain undocumented. Between 1849 and 1855, an estimated $400 million in gold was extracted. In 1942, most mines shut down under the War Production Board's L-208 order during World War II. In Copperopolis, $72 million worth of copper was extracted. Many of the area's copper mines supplied the Union Army during the Civil War. The Mitchler Hotel was built in 1856. The outlaw Black Bart stayed there on multiple occasions. • El Dorado County – Gold was discovered here in 1848 by James W. Marshall at Sutter's Mill. Sutter's Fort was overrun and damaged by the influx of gold-seekers. • Mariposa County – Located along the southern portion of State Route 49, the county is known for the Ghirardelli chocolate factory that operated 1855–1858. The Princeton Mine produced $5 million in gold. • Nevada County – This county produced more gold than any other in the Gold Country, totaling an estimated $440 million. The Holbrooke Hotel in Grass Valley, built in 1851, is one of the oldest continuously operating hotels in the region. The Empire Mine, now a state park, extends 200 miles underground and yielded $100 million in gold. The Nevada County Narrow Gauge Railroad was constructed in 1876, connecting Grass Valley and Nevada City; it was shut down in 1942. In North Bloomfield, many mines produced high volumes of gold during the early 1850s but were largely exhausted by 1853. The Malakoff Diggings were a major hydraulic mining site. Hydraulic mining was used at Howland Flat and Poker Flat in the 1850s. Poker Flat alone yielded $700,000 in gold. Camptonville was one of the county's best-known towns; gold was first discovered there in 1850, and the ground beneath the original town site was so rich in gold that residents relocated the settlement to reach the deposits. == Geology ==

The Gold Country lies on the western slope of the Sierra Nevada, reaching down to the Sacramento Valley. The oldest geology can be found along the easternmost portions of the region, closer to the Sierra Nevada summits, which formed about 100 million years ago. It consists of ancient sea floor and portions of island arcs added onto the western edge of North America during the late Paleozoic, about 275 million years ago. The western sections of the Mother Lode are younger, from the mid-Mesozoic about 150 million years ago, and also consist of material that solidified on the ocean floor before accreting to the continental margin. Massive intrusions of granite forced their way into these formations. After ten miles of overlying material eroded over the past 70 million years, these intrusions became visible throughout the Sierra Nevada range. Over the last 50 million years, rivers and volcanoes deposited sediments that built up in thick layers atop many of the high ridges of the Sierra Nevada foothills. == Climate ==

This part of California has a Mediterranean climate, similar to much of Italy and Spain, making wine grapes and vineyards one of the region's primary agricultural products. Over 100 wineries operate throughout the Gold Country. Winters are cool and wet, with occasional snowfall at higher elevations along the eastern slopes of the Sierra Nevada. Winter temperatures range from the upper twenties to mid-fifties Fahrenheit. Summers are dry and hot, with extended periods reaching triple digits. Average annual precipitation is around . Numerous dams in the Sierra Nevada store snowmelt that supplies much of California's water needs. == Transportation ==

During the Gold Rush, steamboats on the Sacramento, Feather, and San Joaquin rivers carried passengers and freight to inland hubs at Sacramento, Marysville, and Stockton. By 1850, an estimated 28 steamers operated on the Sacramento River alone. From those hubs, pack mule trains and later heavy freight wagons on toll roads carried goods into the Sierra foothills. The Central Pacific Railroad's transcontinental line reached Auburn in 1865 and Colfax later that year, transforming both into supply and junction towns. The Nevada County Narrow Gauge Railroad (1876–1943) connected Grass Valley and Nevada City to the transcontinental corridor at Colfax. In the southern Gold Country, the Sierra Railroad (1897) linked Oakdale to Sonora and Jamestown, where its historic roundhouse is preserved as Railtown 1897 State Historic Park. The Yosemite Valley Railroad (1907–1945) carried tourists from Merced to El Portal at the western boundary of Yosemite National Park. == Counties and towns ==

Counties and the towns that are part of Gold Country: • Amador County • Amador City • Butte City • Drytown • Fiddletown • Ione • Jackson • Plymouth • Sutter Creek • Volcano • Butte County • Bangor • Cherokee • Forbestown • Honcut • Magalia • Paradise • Calaveras County • Angels Camp • Arnold • Camanche • Carson Hill • Copperopolis • Mokelumne Hill • Murphys • San Andreas • Valley Springs • El Dorado County • Cameron Park • Camino • Coloma • Diamond Springs • El Dorado • El Dorado Hills • Georgetown • Lotus • Mount Aukum • Placerville • Pleasant Valley • Pollock Pines • Rescue • Shingle Springs • Somerset • Mariposa County • Agua Fria • Bagby • Bear Valley • Coulterville • Coulterville Main Street Historic District • Hornitos • Mariposa • Mormon Bar • Mount Bullion • Nevada County • Birchville • Bridgeport • French Corral • Graniteville • Grass Valley • Little York • Mooney Flat • Moores Flat • Nevada City • North Bloomfield • North Columbia • North San Juan • Omega • Red Dog • Relief Hill • Rough and Ready • Sweetland • Washington • You Bet • Placer County • Auburn • Colfax • Foresthill • Meadow Vista • Newcastle • Plumas County • Crescent Mills • Greenville • Johnsville • La Porte • Meadow Valley • Nelson Point • Quincy • Rich Bar • Spanish Ranch • Sacramento County • Folsom • Mormon Island • Prairie City • Sierra County • Alleghany • Downieville • Stanislaus County • Empire City • Knights Ferry • La Grange • Tuolumne County • Chinese Camp • Columbia • Groveland-Big Oak Flat • Jamestown • Sonora • Yuba County • Browns Valley • Brownsville • Camptonville • Challenge • Clipper Mills • Dobbins • Marysville • Oregon House • Smartsville • Strawberry Valley • Timbuctoo • Woodleaf == References ==