Hart was a short-lived gold mining town located in the Mojave Desert, in San Bernardino County, California.

In late 1907, while a depression gripped the nation, three prospectors from Goldfield – James Hart and the brothers Bert and Clark Hitt – found pockets of rich gold ore in the Castle Mountains, approximately four miles south of the Barnwell & Searchlight Railroad.

Hart and Hitt's original claim was sold by their promoter, Will Foster, to the Oro Belle Mining Company of Duluth, Minnesota in 1908 for $100,000.

The largest mine besides the Oro Belle was the Big Chief, originally called the Jumbo, also owned by the Hart brothers.

A fire wiped out much of the business district (largely deserted); the leading mines suspended work and the miners’ union was disbanded.