1900s (20th Century) Maps of Sierra County, California
Explore 63 historic maps of Sierra County from the 1900s (20th Century). These maps offer a rare glimpse into what life looked like during the 1900s — showing old roads, neighborhoods, homes, and landmarks that have changed or disappeared over time.
Whether you're researching your family's past, planning a metal detecting trip, or studying how Sierra County's landscape evolved across the 1900s, these high-resolution maps are a powerful tool for exploring the history of this region.
- Focus on a specific era: All maps on this page are from the 1900s, giving you a focused view of this time period.
- See what’s changed: Compare century-old streets, trails, and buildings to today's modern landscape using overlays and satellite layers.
- Research with precision: Use these maps for genealogy, historical research, land use analysis, or educational projects.
- View, download, or print: Maps are fully viewable online in high resolution, and can be downloaded or printed for your own records.
Start exploring Sierra County's history through authentic maps from the 1900s. This is your window into the past.
Sierra County, CA maps
(63)- 1900 Map of Colfax
1900 Colfax1900 Print · USGSThe Sierra Nevada foothills and high peaks are shown at the turn of the century as the mining economy and transcontinental rail travel reached their maturity. Researchers can trace historic industrial sites like the Alaska Mine, remote camps such as Moores Flat, and the path of the Southern Pacific RR. - 1902 Map of Colfax
1902 Colfax1902 Print · USGSGold-rush towns and hydraulic mining sites define this portion of the Sierra Nevada at the turn of the century. Genealogists and historians can trace the foundations of North Bloomfield, locate the remote Alaska Mine, or follow the Southern Pacific through Emigrant Gap.7 unique versions available - 1932 Map of Truckee
1932 Truckee1932 Print · USGSThe high Sierra and Lake Tahoe's western shore are captured here in the early thirties as the region balanced industrial mining and timber with a growing seasonal economy. Trace early lakeside developments from Tahoe Tavern to Meeks Bay PO, or locate historical sites like the Walker Mine and Donner Monument. - 1938 Map of Colfax
1938 Colfax1938 Print · USGSThe Sierra Nevada's gold and timber country comes into focus in the late 1930s, showing a landscape defined by deep river canyons and industrial high-country camps. Researchers can locate remote sites like the Sixteen to One Mine, the North Bloomfield Ranger Station, and vanished settlements like Lake City.3 unique versions available - 1940 Map of Truckee
1940 Truckee1940 Print · USGSThe High Sierra and Lake Tahoe shoreline appear here in the pre-war era, showing a landscape defined by timber, tourism, and transit. Genealogists and historians can trace the early resort development at Tahoe Vista, the lumber works at Hobart Mills, and the vital Southern Pacific rail line.4 unique versions available - 1948 Map of Nevada City, 1953 Print
1948 Nevada City1953 Print · USGSNevada City and the Yuba River canyons are captured here in the late 1940s, just as modern reservoirs began to reshape the old gold country. Genealogists and historians can trace family-named sites like Godfrey Ranch (Pike PO), Pleasant Valley Sch, and the Nevada City Rancheria.4 unique versions available - 1948 Map of Mooreville Ridge, 1953 Print
1948 Mooreville Ridge1953 Print · USGSThe northern Sierra Nevada at the end of the 1940s shows a landscape of deep canyons and timber camps. Locate family-named landmarks like McIntosh Ranch or trace the early industrial footprint of Brandy City and the Monte de Oro Mine.3 unique versions available - 1948 Map of American House, 1956 Print
1948 American House1956 Print · USGSThe Plumas County high country in the late 1940s reveals a landscape of remote mountain ranches and legacy gold mines. Researchers can trace the heritage of American House, locate the Browns Hill Mine, and find family-named sites like McIntosh Ranch.3 unique versions available - 1948 Map of Camptonville, 1956 Print
1948 Camptonville1956 Print · USGSTahoe National Forest's steep canyons and mining settlements are documented here just after the war. Local historians can trace the foundations of Camptonville, find the Godfrey Ranch (Pike PO), or locate remote river sites like Strawberry Bar.4 unique versions available - 1948 Map of Strawberry Valley, 1957 Print
1948 Strawberry Valley1957 Print · USGSThe Sierra Nevada gold country of Yuba and Sierra Counties is captured here just after the war, showing the rugged canyons of the Yuba River. Genealogists and historians can trace the locations of Brandy City, the Palace Mine, and river settlements like Cut Eye Fosters Bar.4 unique versions available - 1949 Map of Pike, 1960 Print
1949 Pike1960 Print · USGSGold country mining and mountain ranching are preserved here in the late Forties, spanning the divide between Sierra and Nevada counties. Genealogists and researchers can trace family-named sites like Clerkins Ranch, locate the Omega Mine, and find the historic Malakoff Diggings area.3 unique versions available - 1949 Map of Alleghany, 1961 Print
1949 Alleghany1961 Print · USGSThe Sierra Nevada mining district is documented here in the late 1940s, highlighting the area’s transition from active gold production to historical memory. Genealogists can trace family connections at the Alleghany Cem or locate vanished settlements at Moores Flat and Orleans Flat.5 unique versions available - 1950 Map of Strawberry Valley
1950 Strawberry Valley1950 Print · USGSThe Gold Country of the northern Sierras comes into focus at mid-century, showing the overlapping boundaries of Plumas and Tahoe National Forests. Genealogists and researchers can trace historical mining sites and river bars like Brandy City, Strawberry Valley, and the Palace Mine. - 1950 Map of Camptonville
1950 Camptonville1950 Print · USGSThe northern Sierra foothills are documented here in the mid-century, showing a landscape defined by deep river canyons and high-altitude ranching. Researchers can locate specific family lands and historic sites like Sleighville House, Joubert Diggings, and Freemans Crossing. - 1950 Map of American House
1950 American House1950 Print · USGSThe Plumas National Forest backcountry is documented here during the post-war era, showing a landscape defined by timber, water, and early mining. Trace local history through sites like American House, the Lexington Hill Lookout, and the Sanborn Mine.2 unique versions available - 1950 Map of Onion Valley, 1958 Print
1950 Onion Valley1958 Print · USGSPlumas County is captured here in the mid-twentieth century, showcasing a landscape shaped by the Feather River and a deep mining history. Genealogists and researchers can trace former settlements at Onion Valley or locate old operations like the Five Bear Mine and Rich Bar.3 unique versions available - 1950 Map of Alleghany, 1959 Print
1950 Alleghany1959 Print · USGSThe Sierra Nevada gold fields appear in high detail during the mid-fifties, showing the massive hydraulic scars and active mining camps of the Yuba River forks. Genealogists and historians can locate vanished settlements like Moores Flat or trace the extensive Malakoff Diggings and Alpha Diggings.4 unique versions available - 1951 Map of Alleghany
1951 Alleghany1951 Print · USGSIn the California gold country just after the war, this landscape shows the deep imprint of the Sierra mining era. Genealogists and researchers can trace family-named sites like Hagerty Ranch, the Sixteen To One Mine, and the vanished settlement at Moores Flat. - 1951 Map of Onion Valley
1951 Onion Valley1951 Print · USGSThe northern Sierra Nevada highlands appear in the early fifties as a landscape of recovering forest and dormant gold works. Trace the history of the Feather River canyon through mining claims like the Belfrin Mine and vanished outposts at McCarthy Bar and Last Chance (Site). - 1951 Map of Pike
1951 Pike1951 Print · USGSThe Sierra Nevada gold country comes alive in the mid-twentieth century as mining sites and ridge-top settlements populate the divide between the Middle Yuba. Genealogists and historians can trace family locations from North Columbia to the Kate Hardy Mine and the massive Malakoff Diggings.2 unique versions available - 1951 Map of Mt. Fillmore, 1952 Print
1951 Mt. Fillmore1952 Print · USGSSierra County gold country is frozen in time during the early 1950s, documenting the remote canyons and high ridges between the Yuba and Downie Rivers. Researchers can trace the heritage of the northern mines through landmarks like Poker Flat, the California Mine, and the Deadwood Diggings.3 unique versions available - 1951 Map of La Porte, 1952 Print
1951 La Porte1952 Print · USGSGold Rush-era mining camps and high-country forests define this landscape in the early fifties. Local historians can trace family roots at Pine Grove Cem or locate the former sites of Gibsonville, Port Wine, and the Thistle Shaft (Site).4 unique versions available - 1951 Map of Downieville, 1953 Print
1951 Downieville1953 Print · USGSThe mining district around Downieville is captured here in the early fifties, showing the deep legacy of the Gold Rush. Researchers can trace historic claims like the Gold Bluff Mine and Monte Cristo Mine or locate the Cornish House and Lavezzola Ranch.6 unique versions available - 1951 Map of Goodyears Bar, 1953 Print
1951 Goodyears Bar1953 Print · USGSSierra County's rugged gold country is documented here during the mid-century, capturing the enduring footprint of mining life and forest management. Researchers can trace the heritage of Goodyears Bar, the remote Eureka Cemetery, and historic sites like the Magnolia Mine.5 unique versions available - 1951 Map of Blue Nose Mtn, 1953 Print
1951 Blue Nose Mtn1953 Print · USGSPlumas County gold country is documented here in the early fifties, showing the high-elevation mines and river bars of the Sierra Nevada. Trace the legacy of early mining at Turkeytown Diggings, the Nelson Point (Site), and the Bunker Hill Mine.5 unique versions available
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