Black Canyon of the Colorado Black Canyon of the Colorado The Black Canyon of the Colorado is the canyon on the Colorado River where Hoover Dam was built. The canyon is located on the Colorado River at the state line between Nevada and Arizona. The western wall of the gorge is in the El Dorado Mountains, and the eastern wall is in the Black Mountains of Arizona. The canyon formed about 15 million years ago during the Miocene Basin and Range uplift. Black Canyon gets its name from the black volcanic rocks that are found throughout the area. Just south of the Hoover Dam on
Colorado City, Nevada Colorado City, Nevada Colorado City is now a ghost town, in Clark County, Nevada, located under Lake Mohave at the mouth of El Dorado Canyon. Colorado City was a mining camp in the Colorado Mining District (New Mexico Territory) and a steamboat landing at the mouth of the El Dorado Canyon on the Colorado River, for shipments via steamboats of the Colorado River. Founded in 1861, Colorado City, was at first located in New Mexico Territory, until 1863, when it became part of Mohave County of Arizona Territory. In 1867 it became part of Lincoln County in the state of