| John Muir Wilderness | |
| Iucn Category: | Ib |
| Map: | USA California#USA |
| Map Size: | 200 |
| Relief: | yes |
| Location: | Fresno / Inyo / Mono / Madera counties, California, United States |
| Nearest City: | Fresno, CA |
| Coordinates: | 36.9758°N -118.8117°W |
| Area Acre: | 652,793 |
| Area Ref: | [1] |
| Established: | January 1, 1964 |
| Governing Body: | U.S. Forest Service |
The John Muir Wilderness is a wilderness area that extends along the crest of the Sierra Nevada of California for 90miles, in the Inyo and Sierra National Forests.[2] Established in 1964 by the Wilderness Act and named for naturalist John Muir, it encompasses 652793acres.[1] The wilderness lies along the eastern escarpment of the Sierra from near Mammoth Lakes and Devils Postpile National Monument in the north, to Cottonwood Pass near Mount Whitney in the south.[3] The wilderness area also spans the Sierra crest north of Kings Canyon National Park, and extends on the west side of the park down to the Monarch Wilderness.
The wilderness contains some of the most spectacular and highest peaks of the Sierra Nevada, with 57 peaks over 13000feet in elevation.[3] The peaks are typically made of granite from the Sierra Nevada Batholith, and are dramatically shaped by glacial action. The southernmost glacier in the United States, the Palisade Glacier, is contained within the wilderness area.[2] Notable east-side glaciated canyons are drained by Rock, McGee and Bishop Creeks.[3]
The eastern escarpment in the wilderness rises from 6000to from base to peak, in 5to.[3] The Sierra crest contains peaks from 12000to in elevation, including Mount Whitney, the highest peak in the continental United States. Other notable mountains in the wilderness area include the Palisades and Mount Humphreys. Mount Muir is located 2 miles south of Mount Whitney. Mount Williamson is the second-highest peak in the wilderness, at 14375feet: it rises in one continuous sweep of granite from the floor of the Owens Valley to a peak just east of the main range.
See main article: Ecology of the Sierra Nevada. The John Muir Wilderness contains the largest contiguous area above 10000feet in the continental United States. It contains large areas of subalpine meadows and fellfields above 10800feet, containing stands of whitebark and foxtail pine.[3] From 9000feet to 10800feet, the wilderness is dominated by lodgepole pines. Below the lodgepole forest is forest dominated by Jeffrey pine.[4]
Common animals in the wilderness include yellow-bellied marmots, pikas, golden-mantled ground squirrels, Clark's nutcrackers, golden trout, and black bears.[3] The wilderness area also includes California bighorn sheep zoological areas, which are set aside for the protection of the species.
The wilderness contains 589.5miles of hiking trails,[3] including the John Muir Trail and the Pacific Crest Trail, which run through the wilderness from north to south. The John Muir Wilderness is the second most-visited wilderness in the United States, and quotas for overnight use have been implemented on virtually all trailheads.[3]