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
Canyon Lake (Arizona) Canyon Lake (Arizona) Canyon Lake is one of four reservoirs that were formed by the damming of the Salt River in the U.S. state of Arizona. The lake was formed by the Mormon Flat Dam, which was completed in 1925 after two years of construction. Canyon Lake, with a surface area of , is the third and smallest of four lakes created along the Salt River. Two others, Apache Lake and Roosevelt Lake, are upstream. The fourth, Saguaro Lake, is downstream. Canyon Lake lies approximately up the Apache Trail from Apache Junction, Arizona and east of Phoenix. It is within