Working from Yosemite National Park

Yosemite National Park is a United States National Park spanning eastern portions of Tuolumne, Mariposa and Madera counties in the central eastern portion of the U.S. state of California. The park, which is managed by the National Park Service, covers an area of 747,956 acres and reaches across the western slopes of the Sierra Nevada mountain range. About 3.8 million people visit Yosemite each year: most spend the majority of their time in the seven square miles (18 km2) of Yosemite Valley.

Designated a World Heritage Site in 1984, Yosemite is internationally recognized for its spectacular granite cliffs, waterfalls, clear streams, giant sequoia groves, beautiful lakes, spectacular mountains, glaciers, and biological diversity. Almost 95% of the park is designated wilderness. Yosemite was central to the development of the national park idea. First, Galen Clark and others lobbied to protect Yosemite Valley from development, ultimately leading to President Abraham Lincoln’s signing the Yosemite Grant in 1864. Later, John Muir led a successful movement to establish a larger national park encompassing not just the valley, but surrounding mountains and forests as well—paving the way for the United States national park system.

Yosemite is one of the largest and least fragmented habitat blocks in the Sierra Nevada, and the park supports a diversity of plants and animals. The park has an elevation range from 2,127 to 13,114 feet (648 to 3,997 m) and contains five major vegetation zones: chaparral/oak woodland, lower montane forest, upper montane forest, subalpine zone, and alpine. Of California’s 7,000 plant species, about 50% occur in the Sierra Nevada and more than 20% within Yosemite. There is suitable habitat for more than 160 rare plants in the park, with rare local geologic formations and unique soils characterizing the restricted ranges many of these plants occupy.

The geology of the Yosemite area is characterized by granitic rocks and remnants of older rock. About 10 million years ago, the Sierra Nevada was uplifted and then tilted to form its relatively gentle western slopes and the more dramatic eastern slopes. The uplift increased the steepness of stream and river beds, resulting in formation of deep, narrow canyons. About 1 million years ago, snow and ice accumulated, forming glaciers at the higher alpine meadows that moved down the river valleys. Ice thickness in Yosemite Valley may have reached 4,000 feet (1,200 m) during the early glacial episode. The downslope movement of the ice masses cut and sculpted the U-shaped valley that attracts so many visitors to its scenic vistas today.

The name “Yosemite” (meaning “killer” in Miwok) originally referred to the name of a renegade tribe which was driven out of the area (and possibly annihilated) by the Mariposa Battalion. Before then the area was called “Ahwahnee” (“big mouth”) by indigenous people.

Ahwahneechee and the Mariposa Wars

As revealed by archeological finds, the Yosemite Valley has been inhabited for nearly 3,000 years, though humans may have first visited the area as long as 8,000 to 10,000 years ago. The indigenous natives called themselves the Ahwahneechee, meaning “dwellers in Ahwahnee.” They are related to the Northern Paiute and Mono tribes. Many tribes visited the area to trade, including nearby Central Sierra Miwoks, who lived along the drainage area of the Tuolumne and Stanislaus Rivers. A major trading route went over Mono Pass and through Bloody Canyon to Mono Lake, just to the east of the Yosemite area. Vegetation and game in the region was similar to that present today; acorns were a staple to their diet, as well as other seeds and plants, salmon and deer.

The California Gold Rush in the mid-19th century dramatically increased travel by European-Americans in the area, causing competition for resources between the regional Paiute and Miwok and the miners and hangers on. In 1851 as part of the Mariposa Wars intended to suppress Native American resistance, United States Army Major Jim Savage led the Mariposa Battalion into the west end of Yosemite Valley. He was pursuing forces of around 200 Ahwahneechee led by Chief Tenaya.

Accounts from this battalion were the first well-documented reports of ethnic Europeans entering Yosemite Valley. Attached to Savage’s unit was Dr. Lafayette Bunnell, the company physician, who later wrote about his awestruck impressions of the valley in The Discovery of the Yosemite. Bunnell is credited with naming Yosemite Valley, based on his interviews with Chief Tenaya. Bunnell wrote that Chief Tenaya was the founder of the Pai-Ute Colony of Ah-wah-nee. The Miwok, a neighboring tribe, and most white settlers considered the Ahwahneechee to be especially violent because of their frequent territorial disputes. The Miwok term for the Pai-Ute band was yohhe’meti, meaning “they are killers”. Correspondence and articles written by members of the battalion helped to popularize the natural wonders of the Yosemite Valley and the surrounding area.

Chief Tenaya and his Ahwahneechee were eventually captured and their village burned; they were removed to a reservation near Fresno, California. The chief and some others were later allowed to return to Yosemite Valley. In the spring of 1852 they attacked a group of eight gold miners, and then moved east to flee law enforcement. Near Mono Lake, they took refuge with the nearby Mono tribe of Paiute. They stole horses from their hosts and moved away, but the Mono Paiutes tracked down and killed many of the Ahwahneechee, including Chief Tenaya. The Mono Paiute took the survivors as captives back to Mono Lake and absorbed them into the Mono Lake Paiute tribe.

A reconstructed “Indian Village of Ahwahnee” has been erected behind the Yosemite Museum, located next to the Yosemite Valley Visitor Center.