Humphreys Peak, Extinct volcano in Coconino County, Arizona

Humphreys Peak is a dormant volcano in Coconino County, Arizona, reaching 12,637 feet (3,852 m), the highest point in the state. It is the tallest of the San Francisco Peaks, a group of dormant volcanic summits about 11 miles north of Flagstaff within the Kachina Peaks Wilderness. Much of the mountain is trachyte, a gray volcanic rock, and a collapse shaped the open bowl on its eastern half.

Humphreys Peak was named around 1870 for General Andrew A. Humphreys, a Union general in the American Civil War and later Chief of Engineers of the U.S. Army Corps of Engineers. A General Land Office map of 1903 instead labeled the feature San Francisco Peak, and the U.S. Board on Geographic Names approved that variant in 1911. The application of the names was rectified in 1933.

The Diné call this mountain Dookʼoʼoosłííd, referring to a summit that holds snow throughout the year. This name reflects the spiritual importance the mountain carries for many Native American groups across the Southwest.

The Humphreys Trail starts at Arizona Snowbowl and runs 4.75 miles (7.6 kilometers) to the summit, with the full hike usually taking between 6 and 8 hours. Hikers should begin early in the day since afternoon thunderstorms are common during the summer months.

Temperatures on the summit stay below freezing for roughly six months each year, with only July averaging above 50 degrees Fahrenheit (10 degrees Celsius). Hikers can experience warm weather at the trailhead and icy conditions at the top on a single summer day.