Rich Gulch is an unincorporated community in Calaveras County, California, 5mi east-northeast of Mokelumne Hill. It lies at an elevation of 1903 feet .A post office was opened at Pleasant Springs in 1855. The name was changed to Rich Gulch in 1857. The post office was closed in 1867, re-established in 1887, and closed for good in 1903.