
The bright colors found in Grand Prismatic Spring come from thermophiles—microorganisms that thrive in hot temperatures
Photo: NPS/Jim Peaco
On March 1, 1872, Yellowstone became the first national park for all to enjoy the unique hydrothermal wonders. Today, millions of people come here each year to camp, hike, and enjoy the majesty of the park.
Yellowstone National Park covers nearly 3,500 square miles in the northwest corner of Wyoming (3% of the park is in Montana and 1% is in Idaho). Yellowstone has five entrance stations, and several are closed to regular vehicles during winter. It takes many hours to drive between these entrances, so be sure to check the status of roads at the entrance you intend to use while planning your trip and before you arrive.
Get directions →Yellowstone's weather can vary quite a bit, even in a single day. In the summer, daytime highs can exceed 70°F (21°C), only to drop 20 or more degrees when a thunderstorm rolls through. It can snow during any month of the year, and winter lows frequently drop below 0°F (-18°C), especially at night. Bring a range of clothing options, including a warm jacket and rain gear, even in the summer.

Most Yellowstone National Park Roads and Entrances Close Nov. 1, 2026, for Winter Season
As fall settles over Yellowstone National Park, most park roads and three entrances will close to regular vehicle traffic on Nov. 1 in preparation for winter. Each year, the park closes its West, South and East entrances, along with nearly all roads, to prepare for winter operations and the start of snowmobile and snowcoach travel season on Dec. 15.

National Park Service, Yellowstone Forever, and Blackstone Infrastructure’s Tallgrass Announce $105 Million Fund for Yellowstone National Park
The National Park Service, together with its official nonprofit and philanthropic partner, Yellowstone Forever, and Blackstone Infrastructure portfolio company Tallgrass, announces the establishment of a $105 million Conservation and Stewardship Fund, creating a permanent source of support for the long-term stewardship of the world’s first national park.

Yellowstone National Park reports September 2026 visitation statistics
Yellowstone National Park hosted 868,450 recreation visits in September 2026, up 3% from September 2025 (839,579 recreation visits).