The Tonto National Forest, encompassing 2,873,200 acres (1,162,700 ha; 11,627 km2), is the largest of the six national forests in Arizona and is the fifth largest national forest in the United States. The forest has diverse scenery, with elevations ranging from 1,400 feet (427 m) in the Sonoran Desert to 7,400 feet (2,256 m) in the ponderosa pine forests of the Mogollon Rim (pronounced MOH-gee-on, or MUH-gee-own). The Tonto National Forest is also the most visited "urban" forest in the United States.