Pleasanton, a community of 75,000, is the wealthiest middle-size city in the country according to the 2010 national… Read more.
Copperopolis
Unlike most of the mining towns in the Calaveras County, Copperopolis' claim to fame is not gold, but copper. It was founded in 1860 by William K. Reed, Dr. Allen Blatchly, and Thomas McCarty, at the site of the second major discovery of copper ore in the region (the first was nearby Telegraph City).