Eldoradoville was a gold mining town in Los Angeles County, located in the San Gabriel Mountains. Established in 1859, after gold had been discovered in the river in 1855, Eldoradoville at its peak population had three stores and six saloons. It was washed away on January 18, 1862, in the Great Flood of 1862. One historian described it as "the Downieville of the south—a rough and tough miner's town."