Lost California Treasure

Tuolumne County Treasure Map

Tuolumne County California treasure-history records: ghost towns, source links, land-status warnings, field notes, and interactive map links.

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1 Tuolumne County Record

  • Columbia Placer District ghost town · Columbia State Historic Park, Tuolumne County · High probability

    Known as the 'Gem of the Southern Mines,' Columbia was established in 1850. Placer miners discovered gold trapped in a labyrinth of limestone karst formations. Miners used high-pressure water hoses to wash away the.