Most of the lake is located in Nevada, but a portion extends into Arizona. A license or use stamp from the respective state is required. People water ski at the lake during every month of the year, wearing wetsuits when it is cold. Daytime air temperatures on the lake at South Cover range from an average high of 57 degrees in January to 105 in July. Low temperatures average 21 degrees in January and range up to 70 degrees in July.
Skies are usually sunny, but wind can cause problems for boaters, particularly during the winter.
Completed in 1935, it was the largest dam of its time and was considered one of the wonders of the world. It's still a major tourist attraction, and visitors are allowed to descend into its bowls. It weighs 5,500,000 tons and contains 3,250,000 cubic yards of concrete. Kids under 6 are free. Hoover Dam is located 30 miles southeast of Las Vegas on State Highway 93.