Yellowstone National Park – America’s First National Park | National …

Established in 1872 and located primarily in Wyoming, Yellowstone National Park was America’s first national park. To this day, Yellowstone remains one of the country’s most popular national parks with millions of annual visitors. Yellowstone spans almost 3,500 miles, and extends into parts of Montana and Idaho, making it one of the largest …

https://www.nationalparks.org/connect/explore-parks/yellowstone-national-park