Agassiz Peak is a 12,360-foot summit in the San Francisco Peaks north of Flagstaff, Arizona, and the state’s second-highest mountain. Located in the Kachina Peaks Wilderness of Coconino National Forest, it shares the volcanic mountain group with Humphreys Peak. Named for Swiss-born American biologist and geologist Louis Agassiz, it is often mistaken in Flagstaff for Humphreys because it stands in front of Arizona’s highest summit and hides it from view. Access is restricted to winter snow conditions; travel above treeline is otherwise illegal to protect the threatened San Francisco Peaks groundsel. Agassiz also holds the distinction of being the southernmost contiguous U.S. summit above 12,000 feet.