Yellowstone National Park, established by the U.S. Congress and signed into law by President Ulysses S. Grant on March 1, 1872, is a national park located primarily in the U.S. state of Wyoming, although it also extends into Montana and Idaho. Yellowstone, widely held to be the first national park in the world, is known for its wildlife and its many geothermal features, especially Old Faithful Geyser, one of the most popular features in the park. It has many types of ecosystems, but the subalpine forest is dominant.
Yellowstone National Park spans an area of 3,468.4 square miles (8,983 km2), comprising lakes, canyons, rivers and mountain ranges. Yellowstone Lake is one of the largest high-altitude lakes in North America and is centered over the Yellowstone Caldera, the largest supervolcano on the continent. The caldera is considered an active volcano. It has erupted with tremendous force several times in the last two million years. Half of the world's geothermal features are in Yellowstone, fueled by this ongoing volcanism. Lava flows and rocks from volcanic eruptions cover most of the land area of Yellowstone. The park is the centerpiece of the Greater Yellowstone Ecosystem, the largest remaining, nearly intact ecosystem in the Earth's northern temperate zone.
黄石国家公园（英语：Yellowstone National Park），简称
黄石公园，是世界第一座国家公园，成立於1872年。黄石公园位於美国中西部怀俄明州的西北角，并向西北方向延伸到爱达荷荷州和蒙大拿州，面积达7988平方公里。这片地区原本是印地安人的圣地，但因美国探险家刘易斯与克拉克远征的发掘，而成为世界上最早的国家公园。它在1978年被列为世界自然遗产。
园内高度从北方入口（蒙大拿州的伽德纳（Gardiner））的5,314英尺（1,620米）上升到公园东南方最高点的鹰峰（Eagle Peak）的11,358英尺（3,462米）。在黄石公园广博的天然森林中有世界上最大的间歇泉集中地带，全球一半以上的间歇泉都在这里。这些地热奇观是世界上最大的活火山存在的证据。黄石公园以熊为其象徵。园内约有200多只
黑熊，100多只灰熊。除此之外，大黄石生态圈的野生动物在这个国家公园里是应有尽有，包括美洲野牛、叉角羚、
驼鹿、马鹿、白尾鹿、大角羊、郊狼、
灰狼、水獭等等。