O’Leary Peak O’Leary Peak is an 8,943-foot (2,726-meter) volcanic summit north of Flagstaff, Arizona, in Coconino National Forest. Rising prominently above the landscape near Sunset Crater Volcano National Monument, the mountain offers sweeping views across the San Francisco Volcanic Field and toward the towering San Francisco Peaks. Although O’Leary Peak is considerably lower than Humphreys …
