Yellowstone National Park

Yellowstone National Park
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Name	Yellowstone National Park
Iucn category	II
Location	United States (Wyoming, Montana, Idaho)
Nearest city	West Yellowstone, Montana
Coordinates	44, 36, N, 110...
Area acre	2,219,791
Established	March 1, 1872
Visitation num	3,290,242
Visitation year	2022
Governing body	National Park Service

Yellowstone National Park. Established by the U.S. Congress and signed into law by President Ulysses S. Grant, it is widely considered the world's first national park. Spanning parts of Wyoming, Montana, and Idaho, the park is renowned for its extraordinary geothermal phenomena and vast wilderness. It forms the core of the Greater Yellowstone Ecosystem, one of the largest nearly intact temperate-zone ecosystems on Earth.

History

The human history of the region extends back over 11,000 years, with evidence of use by Paleo-Indians and later tribes such as the Shoshone, Bannock, and Crow. While trappers like John Colter and members of the Lewis and Clark Expedition brought early reports of its wonders to the American public, organized exploration was galvanized by the Washburn–Langford–Doane Expedition of 1870. The advocacy of figures like Ferdinand V. Hayden and the artwork of Thomas Moran were instrumental in its creation. Following its establishment, the U.S. Army was tasked with its protection until administration was transferred to the newly created National Park Service in 1917.

Geology and geothermal features

The park sits atop the Yellowstone Caldera, the largest supervolcano in North America, fueled by a deep-seated mantle plume. This immense magma chamber is responsible for over 10,000 geothermal features, including more than 500 geysers such as the iconic Old Faithful and the powerful Steamboat Geyser. The landscape is dotted with vibrant hot springs like the Grand Prismatic Spring, bubbling mud pots, and fumaroles. Major geological events include the cataclysmic Lava Creek eruption approximately 640,000 years ago, which created the current caldera.

Ecology and wildlife

The park is a sanctuary for a remarkable array of megafauna and is the only place in the contiguous United States where a full complement of native predators and ungulates has persisted. It is a critical stronghold for the American bison and is central to the recovery of the gray wolf, reintroduced in 1995 after a decades-long absence. Other prominent species include grizzly bears, elk, pronghorn, and bald eagles. The Greater Yellowstone Ecosystem faces challenges from invasive species like lake trout in Yellowstone Lake and the impacts of climate change on forest health.

Climate

The climate is characterized by long, cold winters and short, cool summers, heavily influenced by the park's high average elevation. Record temperatures range from at the Riverside Ranger Station to at Mammoth Hot Springs. Precipitation varies dramatically, creating a rain shadow effect where the western side receives more snow than the eastern plateaus. Weather patterns are largely dictated by the Pacific Ocean and the Continental Divide, which runs through the park.

Tourism and visitor information

The park is accessible via several entrances near gateway communities like West Yellowstone, Montana and Gardiner, Montana. A network of scenic roads, including the Grand Loop Road, connects major attractions such as the Grand Canyon of the Yellowstone, Mammoth Hot Springs, and Yellowstone Lake. The National Park Service manages numerous campgrounds, lodging facilities like the historic Old Faithful Inn, and extensive hiking trails. Visitors are urged to practice bear safety and maintain distance from all wildlife to ensure both human safety and animal welfare.

Category:National parks in the United States Category:Protected areas established in 1872 Category:Wyoming Category:Montana Category:Idaho