Humphreys Peak is the highest natural point in the U.S. state of Arizona, with an elevation of 12,637 feet (3,852 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 extinct volcanic peaks known as the San Francisco Peaks.

The summit can be most easily reached by hiking the 4.8 miles (7.7 km) long Humphreys Trail that begins at the Arizona Snowbowl ski resort in the Coconino National Forest. The last 1 mile (1.6 km) of the trail traverses the only region of tundra in Arizona, at an elevation of more than 11,500 feet (3,505 m). The treeline of Humphreys Peak is around 11,400 feet (3,500 m). Hazards of the hike include a steep and rocky trail, risk of lightning strike, snow, and avalanche danger in winter.

More Info: en.wikipedia.org