Shaft gold mining played a major role in the history of the American West, including in Baldwin Lake, California, where the Shadow Ranch Foundation is located. Gold mining began in the area as early as the 1800s and continued into the 1900s. While the initial placer gold rushes were followed by quartz mining, the ambitious operations ultimately proved unprofitable, and by the early 1900s, most of the large-scale mining efforts had ceased. The large structure in the accompanying images is the Gold Mountain mine and Stamp mill, built by “Lucky Baldwin” in the 1870s. Another photo in the slideshow supports the claim in local records that a brothel, "The Gold Mountain House," was located near the mine.