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The West: Arizona, California, Nevada

Monument Valley is a scenic area on the Navajo reservation in Arizona. The tallest of the sand- stone buttes rise 1,000 feet (300 m) above the valley floor.

Flagstaff and the Grand Canyon see snow in the winter. Overnight temper- atures in those areas dip below freez- ing. History The earliest record of ancient people in Arizona includes spearheads found among mammoth bones from 12,000 years ago.

natural lakes. A series of dams creates artificial lakes, like Lake Powell, Lake Mead, and Lake Havasu. “Dry” is the word that most sums up Arizona’s climate. The low-lying central and southern portions of the state receive about 7 inches (18 cm) of rain each year. In summer, temper- atures there top 100º Fahrenheit (38º Celsius). Meanwhile, places like