Sunset Crater Volcano in Arizona was created by eruptions sometime between 1040 and 1100 A.D. Today Sunset Crater Volcano National Monument protects over 3,000 acres in the Colorado Plateau. The crater represents the most recent volcanic eruption in the the Colorado Plateau. It is also the youngest, least-eroded cinder cone in the San Francisco Volcanic Field.
If You Go
Follow the one-mile nature trail at Sunset Crater, which leads across the Bonito Lava Flow and passes many interesting volcanic features, including an ice cave.