
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.

Update: Yellowstone lifts full closures for Firehole, Madison and Gibbon rivers
Effective Friday, Aug. 28, anglers can fish the Firehole, Madison and Gibbon (downstream of Norris Campground) rivers and all associated tributaries from sunrise until 2 p.m. each day. Cooling weather and water temperatures, as well as precipitation in the current weather forecast, allow for the full closures to be lifted.

Yellowstone National Park to remove invasive fish from Buffalo Creek
Beginning Aug. 31, Yellowstone National Park will temporarily close Buffalo Creek, a tributary of Slough Creek in the northern part of the park, for treatment to remove invasive fish as part of ongoing conservation efforts to preserve native species. It will reopen to the public on Sept. 7.

Yellowstone visitation statistics for July 2026
Yellowstone National Park hosted 958,706 recreation visits in July 2026, down 2% from July 2025 (975,109 recreation visits).