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The West: Arizona, California, Nevada

Theodore Roosevelt Dam on the Salt River is 357 feet (109 m) high. The large Theodore Roosevelt Lake has formed behind the dam, and its water is used to produce electricity, as well for irrigation projects.

The Gila River flows for 649 miles (1,044 km) through New Mexico and Arizona, where it enters the Colorado River. Much of its water is diverted from the river channel for irrigation.

Petrified Forest National Park in northeastern Arizona covers about 146 square miles (380 sq km). The park is rich with fossils from the late Triassic period, about 225 million years ago.

Colorful scenery can be found in the Painted Desert, which is located near the “Four Corners” region where the states of Arizona, Colorado, New Mexico, and Utah meet.