Stretching from Sedona southwest toward the White Mountains of eastern Arizona, the Mogollon Rim marks the southern edge of the Colorado Plateau in Arizona separating the lower desert of southern Arizona from the high plateaus in the north. The Mogollon Rim is known for its stands of Ponderosa pine, which comprise the largest ponderosa pine forest in the United States. The long escarpment, thousands of feet high in some areas, extends for nearly 200 miles (321 kilometers) across central Arizona. This undulating rim and plateau country rises to as high as 7,800 feet (2,377 meters) and averages about 7000 feet (2,133 meters).