National Parks in Idaho
Idaho has one national park: Yellowstone National Park. None of them requires an entry reservation.
Fees and rules checked against NPS.gov · Updated October 6, 2026
At a glance
| Park | Entry | Reservation | Best time to go | How long to stay |
|---|---|---|---|---|
| Yellowstone | $35 per car | Not required | Late May through September for full road access. September brings fewer crowds, rutting elk and crisp mornings. In winter, the interior is reached only by snowcoach or guided snowmobile. | 3 to 4 days to see both loops without rushing. |
Planning guides
- Best Time to Visit Yellowstone National ParkWhen to visit Yellowstone, month by month: road opening and closing dates, crowds, weather, wildlife timing and what is open in each season.
- How Many Days Do You Need in Yellowstone?How many days to spend in Yellowstone, with 1-, 2-, 3- and 4-day itineraries by area, NPS drive times around the Grand Loop and where to base yourself.
- Best Hikes in Yellowstone National ParkThe best day hikes in Yellowstone, from the Grand Prismatic Overlook to Mount Washburn and Avalanche Peak, with NPS distances, elevation gain and 2026 closures.
- Camping in Yellowstone National Park: Campgrounds, Reservations and TipsAll 11 Yellowstone campgrounds with 2026 dates, fees and RV limits, how six-month reservations work, the 2027 move to Recreation.gov and backcountry permits.
Nearby parks in other states
- Grand Teton National ParkWyoming · about 56 miles as the crow flies
- Glacier National ParkMontana · about 321 miles as the crow flies
- Mount Rushmore National MemorialSouth Dakota · about 354 miles as the crow flies
- Wind Cave National ParkSouth Dakota · about 358 miles as the crow flies
- Theodore Roosevelt National ParkNorth Dakota · about 374 miles as the crow flies
See the full list of U.S. national parks · Open the park map · Compare park passes