<Tr> <Th_colspan="2"> Climbing </Th> </Tr> <Tr> <Th> Easiest route </Th> <Td> Humphreys Trail, class 1 </Td> </Tr> <P> Humphreys Peak (Hopi: Aaloosaktukwi, Navajo: Dookʼoʼoosłííd) is the highest natural point in the U.S. state of Arizona, with an elevation of 12,633 feet (3,851 m) and is located within the Kachina Peaks Wilderness in the Coconino National Forest, about 11 miles (17.7 km) north of Flagstaff, Arizona . Humphreys Peak is the highest of a group of dormant volcanic peaks known as the San Francisco Peaks . </P> <P> The summit can be most easily reached by hiking the 4.8 miles (7.7 km) long Humphreys Summit Trail that begins at the Arizona Snowbowl ski resort in the Coconino National Forest . </P>

What type of geologic feature is humphreys peak
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