Boulder Canyon (Colorado River)

Boulder Canyon
Boulder Canyon (Colorado River) Location in Nevada–Arizona
Geography
Coordinates	36°07′32″N 114°40′36″W / 36.12556°N 114.67667°W / 36.12556; -114.67667

Boulder Canyon, originally Devils Gate Canyon,^[1] is a canyon on the Colorado River, above Hoover Dam, now flooded by Lake Mead. It lies between Clark County, Nevada and Mohave County, Arizona. It heads at western end of the Virgin River Basin of Lake Mead, at about 36°09′05″N 114°32′51″W / 36.15139°N 114.54750°W / 36.15139; -114.54750. Boulder Canyon divides the Black Mountains into the Black Mountains of Arizona, and the Black Mountains of Nevada. Its mouth is now under the eastern end of the Boulder Basin of Lake Mead, between Canyon Point in Nevada and Canyon Ridge in Arizona. Its original mouth is now underneath Lake Mead between Beacon Rock and Fortification Ridge on the southern shore in Arizona.^[2]