Updated July 2026

Best Time to Visit Idaho National Parks

Name: Idaho National Park Monthly Crowd & Best-Time Calendar
Creator: WhenToVisitParks
Published: 2026-07-14
License: https://creativecommons.org/publicdomain/zero/1.0/

Idaho has 6 National Park Service units that report visitation. Below, each is ranked by annual visits, with the month our data recommends for the best balance of light crowds, comfortable weather and daylight. Crowds peak in summer almost everywhere — the recommended months show where the quieter shoulder seasons fall.

Reviewed by WhenToVisitParks Editorial Team · Updated Jul 14, 2026

Most-visited parks in Idaho

Yellowstone

Idaho, Montana, Wyoming

National Historical Park

Nez Perce

Idaho, Montana, Oregon, Washington

View Nez Perce →

A close-up shot of a folded, waving sea of lava rock, with mountains in the far distance.

Summer

Best: Aug

National Monument & Preserve

Craters Of The Moon

Idaho

View Craters Of The Moon →

Snow dusted granite formations jut up from a mountainous juniper covered landscape.

Summer

Best: Jul

National Reserve

City Of Rocks

Idaho

National Historic Site

Minidoka

Idaho, Washington

Hagerman Fossil Beds

Idaho

View Hagerman Fossil Beds →

Park	Annual visits	Best time	Busiest	Quietest
YellowstoneNational Park	4,762,988	April	Jul	Nov
Nez PerceNational Historical Park	343,910	July	Aug	Jan
Craters Of The MoonNational Monument & Preserve	260,418	August	Jul	Jan
City Of RocksNational Reserve	90,898	July	Jun	Feb
MinidokaNational Historic Site	43,539	September	Jul	Dec
Hagerman Fossil BedsNational Monument	36,667	September	Jul	Jan

CSV

Idaho park crowd calendar (6 parks, all 12 months)

Download the full best-months table for all 6 of Idaho's national parks — each park's month-by-month crowd index (1.0 = its average month), busiest and quietest months, and Best-Time-to-Visit score. Built from NPS visitation data. Enter your email to download; you'll also get park crowd updates — no spam, unsubscribe anytime.

Where to stay near Idaho's national parks

Find hotels, cabins and vacation rentals across Idaho to base your national-park trip — live availability and prices.

Top-rated places to stay near Idaho national parks

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Planning a Idaho parks trip?

Get the best time to visit Idaho's national parks plus lodging deals by email. No spam, unsubscribe anytime.

Keep exploring

Best national parks to visit in April Quietest parks in April Busiest parks in July How we score the best time to visit National park guides