2. Lake Mead, Nevada-Arizona
Bearing the dubious distinction of most dangerous among Arizona’s five of the 11 deadliest lakes in the United States, Lake Mead is also the largest manmade reservoir in the country. It was created by gigantic Hoover Dam, whose construction cost 100 lives of its own in the 1930s. Boating accidents are rampant in Lake Mead, and the Colorado River as a whole had more boating accidents than the Atlantic Ocean coast.
