Weatherford Trail winds through Kachina Peaks Wilderness, just a sort distance from Flagstaff. This inviting scene among the San Francisco Mountains, found along Weatherford Trail, gives a strong hint that this section of wilderness land is covered with a dense aspen grove. The tree covered basin is actually a huge caldera formed during a recent (in geological time) event about 1.4 million to 400,000 years ago. Above the tree line is Humphreys Peak, reaching to 12,643 feet. Kachina is dotted with trails throughout its 74,000 acres. Weatherford Trail follows an old auto road (mechanical vehicles are restricted in wilderness areas today) and intersects with Humphreys Trail, taking hikers to the highest peak in Arizona. Views from the top take in Flagstaff, Oak Creek Canyon and beyond to Verde Valley.