08/18/2026
The West is packed with national parks, while some of the biggest gaps are found across the Great Plains, Gulf Coast and Northeast.
And yes, the Gateway Arch in St. Louis really is a national park. It was originally established as the Jefferson National Expansion Memorial in 1935 and officially became Gateway Arch National Park in 2018. At only about 91 acres, it’s one of the smallest national parks in the country and is protected primarily for its historical significance rather than its natural landscape.
Still feels weird calling it a national park.