Founded in 1849 and first known as "The Spanish Corral". Area proved so rich that Biblical name of Ophir adopted in 1850. Most populous town in Placer County in 1852, polling 500 votes. Almost totally destroyed by fire July 1853. Later became center of quartz mining in this century.

California Registered Historical Landmark No. 463

Tablet placed by the California Centennials Commission. Base furnished by Placer County Historical Society.
Dedicated September 23, 1950