Eldorado Canyon
Boulder City, NV
Eldorado Canyon runs east to the Colorado River, and around 1859 prospectors began digging its slopes for gold and silver, organizing the Colorado Mining District. Its three great mines — the Techatticup, Wall Street, and El Dorado Rand — yielded more than six million dollars, while steamboats and barges freighted goods some 350 miles up from the Gulf of California to the canyon's mouth. In 1867 the U.S. Army planted an outpost here to guard the river freight and the miners; the mines revived in the 1870s and worked on until World War II.