Lost California Treasure

Morgan Mine & Carson Hill Nugget Site

Discovered in 1850, it became one of the most famous lode gold mines in California. In November 1854, miners unearthed the legendary 'Calaveras Giant' (Carson Hill Nugget), which weighed 195 pounds (2,340 troy ounces) and remains the largest gold nugget ever found in California.

Record typelost mine
LocationCarson Hill, Calaveras County
Probability indexHigh
Land statusPrivate property / historic marker site (Restricted; private mining ground)
Research coordinates38.0083, -120.5019
SourceUSGS Mineral Resources Data System (MRDS ID #10061993)

Field Research Notes

Carson Hill is marked by a historical monument along Highway 49. Much of the hill is covered by a large modern open pit mine and private property. Do not cross fences or trespass on active claims. Metal detecting is permitted on surrounding open BLM land, but ensure you cross-reference active claim maps.

Recommended Gear

BLM LR2000 claim map, Handheld GPS, Metal detector

Related lost mines

  • The Lost Cabin Mine lost mine · Trinity Alps Wilderness Area, Trinity County · Low probability

    In the autumn of 1850, three prospectors named Cox, Wood, and Buck followed the Trinity River up into the rugged headwaters. Near a waterfall, they found a rich gravel bed loaded with heavy gold nuggets. They.

  • The Lost Cement Mine lost mine · Near Mammoth Lakes, Mono County · Low probability

    In 1857, two miners wandering lost in the Eastern Sierra discovered a vein of rich, red volcanic cement-like rock that was packed with pure gold. They chipped off a few pounds of the rock, showing it to others when.

  • Goose Egg Mine lost mine · El Dorado County, located in the historic Mosquito Valley, downstream from Newtown and Placerville. · Low probability

    Rooted in the early excitement of the 1848 California Gold Rush, the legend of the Goose Egg Mine began when a lone prospector reportedly discovered a highly concentrated placer deposit in Mosquito Valley that yielded.

  • Waterfall Mine lost mine · Shasta County, located in the rugged mountainous backcountry approximately thirty miles up a tributary of Cow Creek, potentially near Bear Canyon. · Low probability

    In the early 1850s, a small party of prospectors from the East Coast traveled into Shasta County, crossing near Cow Creek and Fort Reading, and followed a rugged stream thirty miles into the high mountains. There, they.

  • Great Blue Lead at Forest City and Bald Mountain lost mine · Forest City and Bald Mountain drift-mining country, Sierra County, northern Sierra Nevada · Medium probability

    Forest City and the Bald Mountain drift mine sat on the famed Great Blue Lead, a buried auriferous channel that drove some of Sierra County's most persistent lost-channel speculation. Historical accounts describe the.

  • Empire Mine State Historic Park lost mine · 10791 E Empire St, Grass Valley, Nevada County · High probability

    One of the oldest, largest, deepest, and richest hard-rock gold mines in California. Operating for over 106 years from 1850 to 1956, it produced 5.8 million ounces of gold from 367 miles of underground passages.