Yellowstone
The world's first national park: geysers, hot springs and the best wildlife in the Lower 48.
1 national park in Idaho
Idaho's National Park
Idaho is home to Yellowstone National Park. The world's first national park: geysers, hot springs and the best wildlife in the Lower 48.
The best time to visit Yellowstone National Park is June and September. For great conditions with fewer people, aim for January, February and October. It's busiest in June through September.
About the park
Road trips through Idaho
Yellowstone & Grand Teton
Geysers, bison, wolves and the jagged Tetons. Two of the most famous parks in the country sit just 10 miles apart.
Nearby parks in other states
Grand Teton
Wyoming · Best Jun, Sep
Glacier
Montana · Best Jul–Sep
Wind Cave
South Dakota · Best May–Jun, Sep–Oct
Theodore Roosevelt
North Dakota · Best Jun–Sep
Questions
How many national parks are in Idaho?
Idaho has 1 national park: Yellowstone National Park. Some of these are shared with neighboring states.
When is the best time to visit national parks in Idaho?
The best time to visit Yellowstone National Park is June and September. For great conditions with fewer people, aim for January, February and October. It's busiest in June through September.
Last reviewed October 4, 2026. Ratings are editorial. Rules and road openings change each year, so confirm on the official NPS site before you go.