California Historical Landmarks in Calaveras County
California Historical Landmark 272
SR 4 Between Monge Ranch and Ansil Davis Roads
Douglas Flat was a roaring mining camp of the early 1850s. In 1857 the Harper and Lone Star Claims produced $130,000 worth of gold. The so-called Central Hill Channel, an ancient river deposit from which vast quantities of gold have been taken, is located here.
Citation from California Office of Historic Preservation