Updated July 2026
Best Time to Visit Washington National Parks
Washington has 12 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.
Most-visited parks in Washington
Olympic
Washington
View Olympic →Mount Rainier
Washington
View Mount Rainier →Lake Roosevelt
Washington
View Lake Roosevelt →
Fort Vancouver
Oregon, Washington
View Fort Vancouver →San Juan Island
Washington
View San Juan Island →Nez Perce
Idaho, Montana, Oregon, Washington
View Nez Perce →| Park | Annual visits | Best time | Busiest | Quietest |
|---|---|---|---|---|
| OlympicNational Park | 3,584,187 | May | Aug | Dec |
| Mount RainierNational Park | 1,635,342 | May | Jul | Feb |
| Lake RooseveltNational Recreation Area | 1,183,757 | May | Jul | Dec |
| Fort VancouverNational Historic Site | 1,071,161 | September | Jul | Dec |
| San Juan IslandNational Historical Park | 420,922 | April | Jul | Jan |
| Nez PerceNational Historical Park | 343,910 | July | Aug | Jan |
| Lewis and ClarkNational Historical Park | 244,195 | May | Jul | Dec |
| Klondike Gold Rush - Seattle UnitNational Historical Park | 81,652 | February | Jul | Jan |
| Manhattan ProjectNational Historical Park | 56,390 | May | Jul | Jan |
| Whitman MissionNational Historic Site | 54,089 | August | May | Dec |
| North CascadesNational Park | 46,925 | May | Jul | Jan |
| MinidokaNational Historic Site | 43,539 | September | Jul | Dec |
Washington park crowd calendar (12 parks, all 12 months)
Download the full best-months table for all 12 of Washington'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 Washington's national parks
Find hotels, cabins and vacation rentals across Washington to base your national-park trip — live availability and prices.
Top-rated places to stay near Washington 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 Washington parks trip?
Get the best time to visit Washington's national parks plus lodging deals by email. No spam, unsubscribe anytime.