Lake Mead, the largest manmade reservoir in the U.S., is primarily located in Nevada, with parts extending into Arizona.

Lake Mead is the largest manmade reservoir in the United States, created by the construction of the Hoover Dam on the Colorado River. While the majority of the lake lies in Nevada, it also extends into Arizona, serving as a critical water source for the southwestern U.S. The lake provides water for millions of people, as well as irrigation and hydroelectric power. It also offers recreational opportunities like boating and fishing. However, over the years, Lake Mead’s water levels have fluctuated due to drought and increasing demand, raising concerns about its long-term sustainability.