Boulder Basin is the westernmost of the three basins occupied by the

Lake Mead Lake Mead is a reservoir formed by the Hoover Dam on the Colorado River in the Southwestern United States. It is located in the states of Nevada and Arizona, east of Las Vegas. It is the largest reservoir in the US in terms of water capacity. L ...

reservoir A reservoir (; ) is an enlarged lake behind a dam, usually built to water storage, store fresh water, often doubling for hydroelectric power generation. Reservoirs are created by controlling a watercourse that drains an existing body of wa ...

and lies within the boundaries of

Clark County, Nevada Clark County is the most populous County (United States), county in the U.S. state of Nevada with 2,265,461 residents as of the 2020 United States census, 2020 census. The county is the location of the state's three largest cities, Las Vegas (t ...

and

Mohave County, Arizona Mohave County occupies the northwestern corner of the U.S. state of Arizona, one of 15 List of counties in Arizona, counties in the state. As of the 2020 United States census, 2020 census, its population was 213,267. The county seat is Kingman ...

. It includes the area between

Hoover Dam The Hoover Dam is a concrete arch-gravity dam in the Black Canyon of the Colorado, Black Canyon of the Colorado River (U.S.), Colorado River, on the border between the U.S. states of Nevada and Arizona. Constructed between 1931 and 1936, d ...

and the mouth of Boulder Canyon at Auxiliary Point. When the

is full it reaches an elevation of . It includes Las Vegas Bay, Swallow Bay,

Callville Bay Callville Bay is a waterway on the northwestern side of Lake Mead in the U.S. state of Nevada. It has a marina and camping resort. Situated east of Las Vegas and upstream from Las Vegas Bay, it lies within the Lake Mead National Recreation Area, w ...

and Hamblin Bay.

References

{{coord, 36, 05, 00, N, 114, 45, 04, W, display=title Boulder Basin Boulder Basin Bodies of water of Mohave County, Arizona