S.R. 67 Between Jacob Lake, Arizona and Grand Canyon National Park, North Rim (14) by Ken Lund Via Flickr: At 1.6 million acres (650,000 ha) the Kaibab National Forest borders both the north and south rims of the Grand Canyon, in north-central Arizona. The Grand Canyon is a natural boundary between the North Kaibab and the South Kaibab. The Kaibab Plateau is an island surrounded by lower elevations. The plateau, with elevation up to 9,215 feet (2,800 m) is bordered on the south by the Grand Canyon, on the east and the west by tributary canyons of the Colorado River, and on the North by tiers of uplifted cliffs. Vegetation in the forest varies by elevation and exposure. Principal tree species are ponderosa pine, Douglas-fir, Engelmann spruce, aspen, blue spruce, oak, pinyon pine, and juniper. Among other things, they enhance the beauty of the landscape, hold soil in place, and provide cover and food for wildlife. As elevation decreases, trees give way to bitter brush, Gambel oak, sagebrush, and cliffrose. Within the forest, there are irregular areas entirely free of tree growth. en.wikipedia.org/wiki/Kaibab_National_Forest en.wikipedia.org/wiki/Wikipedia:Text_of_Creative_Commons_...