Long Valley Caldera is a depression in eastern California that is adjacent to Mammoth Mountain. The valley is one of the Earth's largest calderas, measuring about 20 mi (32 km) long (east-west), 11 mi (18 km) wide (north-south), and up to 3,000 ft (910 m) deep.
Inyo County is a county in the eastern central part of the U.S. state of California, located between the Sierra Nevada and the state of Nevada. In the 2020 census, the population was 19,016. The county seat is Independence. Inyo County is on the east side of the Sierra Nevada and southeast of Yosemite National Park in Central California. It contains the Owens River Valley; it is flanked to the west by the Sierra Nevada and to the east by the White Mountains and the Inyo Mountains. With an area of 10,192 square miles (26,400 km2), Inyo is the second-largest county by area in California, after San Bernardino County. Almost one-half of that area is within Death Valley National Park. However, with a population density of 1.8 people per square mile, it also has the second-lowest population density in California, after Alpine County.
Mono County is a county located in the east central portion of the U.S. state of California. As of the 2020 census, the population was 13,195, making it the fourth-least populous county in California. The county seat is Bridgeport. The county is located east of the Sierra Nevada between Yosemite National Park and Nevada. The only incorporated town in the county is Mammoth Lakes, which is located at the foot of Mammoth Mountain. Other locations, such as June Lake, are also famous as skiing and fishing resorts. Located in the middle of the county is Mono Lake, a vital habitat for millions of migratory and nesting birds. The lake is located in a wild natural setting, with pinnacles of tufa arising out of the salty and alkaline lake. Also located in Mono County is Bodie, the official state gold rush ghost town, which is now a California State Historic Park.
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.
The Mono–Inyo Craters are a volcanic chain of craters, domes and lava flows in Mono County, Eastern California. The chain stretches 25 miles (40 km) from the northwest shore of Mono Lake to the south of Mammoth Mountain. The Mono Lake Volcanic Field forms the northernmost part of the chain and consists of two volcanic islands in the lake and one cinder cone volcano on its northwest shore. Most of the Mono Craters, which make up the bulk of the northern part of the Mono–Inyo chain, are phreatic volcanoes that have since been either plugged or over-topped by rhyolite domes and lava flows. The Inyo volcanic chain form much of the southern part of the chain and consist of phreatic explosion pits, and rhyolitic lava flows and domes. The southernmost part of the chain consists of fumaroles and explosion pits on Mammoth Mountain and a set of cinder cones south of the mountain; the latter are called the Red Cones.
The Owens River is a river in eastern California in the United States, approximately 183 miles (295 km) long. It drains into and through the Owens Valley, an arid basin between the eastern slope of the Sierra Nevada and the western faces of the Inyo and White Mountains. The river terminates at the endorheic Owens Lake south of Lone Pine, at the bottom of a 2,600 sq mi (6,700 km2) watershed.
The Sherwin Range is a mountain range that is a sub-range of the Sierra Nevada system, in Mono County, eastern California. The range is also known locally as The Sherwins.
Mono Lake Tufa State Natural Reserve is located near Yosemite National Park within Mono County, in eastern California. It was established in 1981 by the California State Legislature to preserve the natural limestone "tufa tower" formations at Mono Lake.
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 point in the contiguous United States; Boundary Peak, the highest point in Nevada; and the Ancient Bristlecone Pine Forest, which protects the oldest living trees in the world. The forest, encompassing much of the Owens Valley, was established by Theodore Roosevelt as a way of sectioning off land to accommodate the Los Angeles Aqueduct project in 1907, making the Inyo National Forest one of the least wooded forests in the U.S. National Forest system.
Hot Creek, starting as Mammoth Creek, is a stream in Mono County of eastern California, in the Western United States. It is within the Inyo National Forest.
Minaret Summit is a mountain pass on Highway 203 in the central Sierra Nevada. The pass, lying on the Madera-Mono County border, is within the Mammoth Ranger District of the Inyo National Forest and located near Devils Postpile National Monument, Mammoth Lakes, and Mammoth Mountain. The elevation of the pass is about 9,265 ft (2,824 m). Highway 203 ends at Minaret Summit. The road continues, now called Reds Meadow Road, until its dead end at the Reds Meadow Pack Station near the Rainbow Falls trailhead.
June Lake is an unincorporated community and census-designated place (CDP) in Mono County, California, United States. It is located against the southern rim of the Mono Basin, 12.5 miles (20 km) south of Lee Vining, at an elevation of 7,654 feet (2,333 m).
The California Volcano Observatory (CalVO) is the volcano observatory that monitors the volcanic and geologic activity of California and Nevada. It is a part of the Volcano Hazards Program of the United States Geological Survey, a scientific agency of the United States government.
Roadside Heritage is a program designed to document and publicize the history, culture, and scientific background of the Eastern Sierra Nevada and the Owens Valley in the United States. It uses schoolchildren to interview scientists, Native Americans, and others and to record the interviews. These result in "audio stories" which can be downloaded from the website for use by travelers and others interested in the area.
The Eastern Sierra is a region in California comprising the eastern side of the Sierra Nevada, which includes Mono and Inyo Counties. The main thoroughfare is U.S. Route 395, which passes through Bridgeport, Lee Vining, Bishop, Big Pine, Independence, Lone Pine, and Olancha, with Bishop being the largest city in the area. It is sparsely populated but well known for its scenery; major points of interest include Mono Lake, Bodie, Mammoth Lakes, Manzanar, Mount Whitney and parts of Yosemite National Park, Sequoia National Park, Kings Canyon National Park and Death Valley National Park.
Red and White Mountain is a remote 12,816-foot-elevation mountain summit located on the crest of the Sierra Nevada mountain range in northern California, United States. It is situated in the John Muir Wilderness on the shared boundary of Sierra National Forest with Inyo National Forest, and along the common border of Fresno County with Mono County. It is eight miles northeast of Lake Thomas A Edison, and approximately 13 miles (21 km) southeast of the community of Mammoth Lakes. The nearest higher neighbor is Red Slate Mountain, 2 miles (3.2 km) to the north-northwest.
Crystal Crag is a 10,377-foot-elevation summit located in the Sierra Nevada mountain range in Mono County of northern California, United States. This photogenic landmark, popular with rock climbers, is situated approximately three miles south of the community of Mammoth Lakes, on land managed by Inyo National Forest. Topographic relief is significant as the north aspect rises 1,300 feet above Lake George in one-half mile. Crystal Lake lies below the west aspect and T J Lake below the east aspect. Precipitation runoff from the peak drains into these three lakes, thence north to Mammoth Creek. This mountain's toponym has been officially adopted by the United States Board on Geographic Names.
Mount Crocker is a remote 12,458-foot-elevation mountain summit located on the crest of the Sierra Nevada mountain range in northern California, United States. It is situated in the John Muir Wilderness, on the boundary shared by Sierra National Forest with Inyo National Forest, and along the common border of Fresno County with Mono County. Crocker ranks as the 291st-highest summit in California. Topographic relief is significant as the north aspect rises 2,500 feet above McGee Creek in approximately one mile. It is nine miles northeast of Lake Thomas A Edison, and approximately 15 miles (24 km) southeast of the community of Mammoth Lakes.
Mount Stanford is a 12,838-foot-elevation (3,913 meter) mountain summit located on the crest of the Sierra Nevada mountain range in northern California, United States. It is situated in the John Muir Wilderness, on the boundary shared by Sierra National Forest with Inyo National Forest, and along the common border of Fresno County with Mono County. It is 10 miles northeast of Lake Thomas A Edison, and approximately 15 miles (24 km) southeast of the community of Mammoth Lakes. Topographic relief is significant as the north aspect rises 3,200 feet above McGee Creek in approximately 1.75 mile. There is another Mount Stanford in the Sierra Nevada which is named for Stanford University.
Mount Lewis is a 12,350-foot-elevation mountain summit located along the crest of the Sierra Nevada mountain range, in Mono County of northern California, United States. It is situated in the Ansel Adams Wilderness, on land managed by Inyo National Forest. The summit lies less than one mile outside of Yosemite National Park's eastern boundary, and some of the lower western slope lies within the park. The mountain rises 1.8 miles (2.9 km) southeast of Mono Pass, 1.5 miles (2.4 km) northeast of Parker Pass, and two miles north of Parker Peak, which is the nearest higher neighbor. Topographic relief is significant as it rises over 5,200 feet above Grant Lake in four miles which makes the mountain visible from Highway 395.
