Johnny Lang was an American cattle driver who discovered Lost Horse Mine in Joshua Tree National Park. He claimed that he had moved to the area because his brother had been gunned down in New Mexico with six other cowboys. In 1890, in the process of herding their cattle, they lost their horses in what is now known as Lost Horse Valley. He tracked them to what is now known as Keys Ranch, which at that time was believed to be occupied by cattle rustlers from what known as the McHaney Gang, but did not find the horses. He then claimed he then met “Dutch” Frank, who claimed he discovered a rich gold claim but was afraid to develop it because he had been threatened by the purported rustlers. Lang and his father bought the rights to the mine, purportedly for $1,000.00, and named it "Lost Horse". He claimed to have taken on three partners as back-up, out of fear of the gang of purported rustlers or having his claim jumped. The four men filed their claim, set up a two-stamp mill and began to produce substantial amounts of gold. Lang's claim and mill were then sold to a Montana rancher named J.D. Ryan. Much of this history was provided by longtime Joshua Tree area resident long-time resident William F. Keys, for whom Keys Ranch was named.