The Ansel Adams Wilderness is a wilderness area in the

Sierra Nevada The Sierra Nevada () is a mountain range in the Western United States, between the Central Valley of California and the Great Basin. The vast majority of the range lies in the state of California, although the Carson Range spur lies primarily ...

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

. The wilderness spans ; 33.9% of the territory lies in the

Inyo National Forest Inyo National Forest is a United States National Forest covering parts of the eastern Sierra Nevada of California and the White Mountains of California and Nevada. The forest hosts several superlatives, including Mount Whitney, the highest poi ...

, 65.8% is in the

Sierra National Forest Sierra National Forest is a U.S. national forest located on the western slope of central Sierra Nevada in Central California and bounded on the northwest by Yosemite National Park and the south by Kings Canyon National Park. The forest is kno ...

, and the remaining 0.3% covers nearly all of

Devils Postpile National Monument Devils Postpile National Monument is a U.S. National Monument located near Mammoth Mountain in Eastern California. The monument protects Devils Postpile, an unusual rock formation of columnar basalt, “all closely and perfectly fitted together ...

Yosemite National Park Yosemite National Park ( ) is an American national park in California, surrounded on the southeast by Sierra National Forest and on the northwest by Stanislaus National Forest. The park is managed by the National Park Service and covers an ar ...

lies to the north and northwest, while the

John Muir Wilderness The John Muir Wilderness is a wilderness area that extends along the crest of the Sierra Nevada of California for , in the Inyo and Sierra National Forests. Established in 1964 by the Wilderness Act and named for naturalist John Muir, it encompa ...

lies to the south.

History

The wilderness was established as part of the original

Wilderness Act The Wilderness Act of 1964 () was written by Howard Zahniser of The Wilderness Society. It created the legal definition of wilderness in the United States, and protected 9.1 million acres (37,000 km²) of federal land. The result of a lon ...

in 1964 as the Minarets Wilderness. The Minarets Wilderness was created by enlarging and renaming the Mount Dana-Minarets Primitive Area. In 1984, after his death, the area was expanded and renamed in memory of

Ansel Adams Ansel Easton Adams (February 20, 1902 – April 22, 1984) was an American landscape photographer and environmentalist known for his black-and-white images of the American West. He helped found Group f/64, an association of photographers advoca ...

, well-known environmentalist and nature photographer who is famous for his black-and-white landscape photographs of the Sierra Nevada.

Geography and Geology

The Ansel Adams wilderness spans in elevation from , forming the northern end of the High Sierra. The centerpiece of the Ansel Adams wilderness is the

Ritter Range The Ritter Range is a small mountain range within California's Sierra Nevada. Most of the mountain range lies within the Ansel Adams Wilderness. The John Muir Trail passes by many lakes within the Ritter Range. The most prominent peaks of the Rit ...

, which includes dark

metavolcanic Metavolcanic rock is volcanic rock that shows signs of having experienced metamorphism. In other words, the rock was originally produced by a volcano, either as lava or tephra. The rock was then subjected to high pressure, high temperature or both ...

glaciated A glacier (; ) is a persistent body of dense ice that is constantly moving under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires distinguishing features, such as ...

mountains such as

Mount Ritter Mount Ritter is the highest mountain in Madera County, California, Madera County, California, in the Western United States, at an elevation of . It is also the highest and most prominent peak of its namesake, the Ritter Range, a subrange of the S ...

, Banner Peak, and

The Minarets The Minarets are a series of jagged peaks located in the Ritter Range, a sub-range of the Sierra Nevada in the state of California. They are easily viewed from Minaret Summit, which is accessible by auto. Collectively, they form an arête, and a ...

. Immediately to the east of the Ritter Range is the Middle Fork of the

San Joaquin River The San Joaquin River (; es, Río San Joaquín) is the longest river of Central California. The long river starts in the high Sierra Nevada, and flows through the rich agricultural region of the northern San Joaquin Valley before reaching Suis ...

, which contains Devils Postpile, a series of basaltic columns that were revealed and smoothed by glacier action. The Middle Fork originates from Thousand Island Lake, at the foot of Banner Peak, one of the largest backcountry lakes in the Sierra. To the east of the Middle Fork canyon is the true Sierra Crest, which, at roughly of elevation is lower than the Ritter Range. This relatively low region of the Crest allows winter storms through and cause large amounts of snowfall on

Mammoth Mountain Mammoth Mountain is a lava dome complex partially located within the town of Mammoth Lakes, California, in the Inyo National Forest of Madera and Mono Counties. It is home to a large ski area primarily on the Mono County side. Mammoth Mount ...

, which sits in the gap. The gap also allows migration of plants and animals across the Sierra Crest. To the west of the Ritter Range lies the canyon of the North Fork of the San Joaquin, a relatively remote and unvisited high-country area. The southern part of the wilderness contains the deep canyon of the main San Joaquin River, which flows out of the Sierra Nevada to California's Central Valley. Panoramaanseladams

Ecology

The Ansel Adams wilderness contains substantial area above treeline, at approximately . The area above treeline contains alpine meadows and

fellfield A fellfield or fell field comprises the environment of a slope, usually alpine or tundra, where the dynamics of frost (freeze and thaw cycles) and of wind give rise to characteristic plant forms in scree interstices. Soil dynamics The freeze-thaw ...

s, with a large number of glacial lakes. Below treeline, the wilderness is dominated by

lodgepole pine ''Pinus contorta'', with the common names lodgepole pine and shore pine, and also known as twisted pine, and contorta pine, is a common tree in western North America. It is common near the ocean shore and in dry montane forests to the subalpine, ...

red fir ''Abies magnifica'', the red fir or silvertip fir, is a western North American fir, native to the mountains of southwest Oregon and California in the United States. It is a high-elevation tree, typically occurring at elevation, though only rare ...

, and

Jeffrey pine ''Pinus jeffreyi'', also known as Jeffrey pine, Jeffrey's pine, yellow pine and black pine, is a North American pine tree. It is mainly found in California, but also in the westernmost part of Nevada, southwestern Oregon, and northern Baja Califo ...

, depending on elevation. Alger Lakes Ansel Adams Wilderness

Recreation

The wilderness contains of hiking trails, including portions of the

John Muir John Muir ( ; April 21, 1838December 24, 1914), also known as "John of the Mountains" and "Father of the National Parks", was an influential Scottish-American naturalist, author, environmental philosopher, botanist, zoologist, glaciologist, a ...

and

Pacific Crest Trail The Pacific Crest Trail (PCT), officially designated as the Pacific Crest National Scenic Trail, is a long-distance hiking and equestrian trail closely aligned with the highest portion of the Cascade and Sierra Nevada mountain ranges, which lie ...

s. The

Sierra High Route The Sierra High Route (also called the Roper Route and the High Route) is a cross-country hiking route, long, through the Sierra Nevada. It was scouted by Steve Roper and described by him in his book ''Sierra High Route: Traversing Timberline ...

, an off-trail route described by Steve Roper, runs along the base of the Ritter Range, through the wilderness. The Middle Fork of the San Joaquin receives the most visitors: a mandatory bus is required for visitors to reach Devils Postpile from the

Mammoth Mountain Ski Area Mammoth Mountain Ski Area is a large ski resort in the western United States, located in eastern California along the east side of the Sierra Nevada mountain range in the Inyo National Forest. Mammoth has more than of ski-able terrain, serviced ...

during the summer. The Minarets are a well-known area for technical rock climbing. Winter brings various

cross-country ski Cross-country skiing is a form of skiing where skiers rely on their own locomotion to move across snow-covered terrain, rather than using ski lifts or other forms of assistance. Cross-country skiing is widely practiced as a sport and recreation ...

possibilities, accessible from both Mammoth Mountain and the

June Mountain June Mountain ski area is a winter resort in the eastern Sierra Nevada of California, located near June Lake, southeast of Yosemite National Park. June Mountain, like its neighbor and current owner, Mammoth Mountain Ski Area, has traditionally ...

ski area.

References

Sierra National Forest Wilderness PageInyo National Forest

External links