Coconino National Forest - Geography

Geography

The elevation in the forest ranges from 2,600 feet (800 m) in the southern part of the forest near the Verde River to 12,633 feet (3,851 m) at the summit of Humphreys Peak, the highest point in the state of Arizona. Much of the forest is a high altitude plateau (average elevation is roughly 7,000 feet (2,100 m) on the plateau) that is located in the midst of the largest contiguous ponderosa pine forest in North America. The southern border of this plateau is the Mogollon Rim, a nearly 400 mile (640 km) long escarpment running across central Arizona that also marks the southern boundary of the Colorado Plateau. The Coconino National Forest is divided into four districts that each possess their own distinct geography and environments.

The northernmost district, known as the Flagstaff District, is home to the San Francisco Peaks, an ancient group of volcanic summits. The highest peak, Humphreys Peak, is the highest point in Arizona at 12,633 feet (3,851 m). The second, third, and fourth highest peaks in Arizona are found nearby. The San Francisco Peaks are the dominant structure of the San Francisco Volcanic Field, an 1,800 square mile (4,700 km2) volcanic field that contains more than 600 volcanic features. The Coconino National Forest encompasses a large portion of the volcanic field and so the forest landscape around Flagstaff is dotted with tree-covered cinder cones, lava flows, and underground lava tubes (such as Lava River Cave). The Flagstaff District surrounds two United States National Monuments near Flagstaff, Walnut Canyon National Monument and Sunset Crater Volcano National Monument the latter of which preserves the youngest cinder cone in the San Francisco Volcanic Field, Sunset Crater. The forest borders another National Monument, Wupatki National Monument on its northeast corner.

Located in the southern portion of the Flagstaff District is Mormon Lake, the largest natural lake in the state of Arizona. Several other natural lakes, including Ashurst Lake and Marshall Lake, dot the top of Anderson Mesa, an approximately 20-mile (30 km) long ridge that rises 200 to 400 feet (60−120 m) above the surrounding landscape. Anderson Mesa is best known for the branch of Lowell Observatory located along the edge of the mesa. At the base of the southwest side of Anderson Mesa are two narrow, manmade reservoirs constructed in the early 1900s, Upper Lake Mary and Lower Lake Mary. Upper Lake Mary contains water year round in all but the very driest years while Lower Lake Mary, located just to the northwest of Upper Lake Mary, usually resembles a wet meadow rather than a lake.

The Red Rock district, centered on the town of Sedona, encompasses many of the famous red rock buttes and mesas, and canyons that have made Sedona famous as a resort town. Just north of Sedona is Oak Creek Canyon, one of the many large canyons located along the Mogollon Rim. Oak Creek Canyon is one of the most popular recreation destinations in the Coconino National Forest and along with Sedona is Arizona's second most popular tourist attraction, second only to the Grand Canyon. Oak Creek Canyon is also a popular leaf peeping area in the fall as it is one of the few areas in the forest where decidious trees are the dominant vegetation type. This region is also home to Sycamore Canyon, the second largest canyon in Arizona. Elevations in this part of the forest are substantially lower (Sedona is at 4,500 feet (1,400 m) above sea level) than the rest of the forest resulting in higher temperatures year round.

The fourth district is the Mogollon Rim District, located along the Mogollon Rim south of the Mormon Lake District and east of the Red Rock District. The landscape here resembles the Mormon Lake District with a number of small lakes and perennial streams scattered among a dense ponderosa pine forest. The southern boundary of the district is the edge of the Mogollon Rim where the Coconino National Forest borders the Tonto National Forest and Coconino County borders Gila County.