Is Chinook Pass (SR 410) open?
SR-410 · Mount Rainier National Park · Washington
Seasonal — closed for winter
Chinook Pass (SR 410) is closed for the winter. It typically reopens late May, targeted to Memorial Day weekend.
Last checked Wed, 14 Oct 2026 13:00:58 GMT
State Route 410 over 5,430-ft Chinook Pass, along the northeast corner of Mount Rainier National Park between Enumclaw and the SR-123 junction at Cayuse Pass.
Mount Rainier National Park — check current park status.
When does Chinook Pass (SR 410) open?
Typically open late May, targeted to Memorial Day weekend to late October to mid-November. Plowing usually begins in April; the opening date depends entirely on snowpack and can swing several weeks.
Closed by snow across the pass each winter; WSDOT plows it open in spring, aiming for Memorial Day weekend. The lower west end to Crystal Mountain Boulevard stays open year-round. In 2024 a spring washout kept the pass closed for the whole season.
| Year | Opened |
|---|
| 2019 | May 23 |
| 2020 | June 4 |
| 2021 | May 26 |
| 2022 | May 26 |
| 2023 | May 26 |
| 2024 | did not fully reopen — spring washout; partial access to the SR-123 junction from May 24 |
| 2026 | May 22 |
Opening dates from the National Park Service.
How we know this
We watch Mount Rainier National Park's official National Park Service alerts for anything that names Chinook Pass (SR 410) or SR-410, and refresh this page with the daily build. Between closures we show the typical season and recent opening dates. It's our reading of public information, not an official determination. Always check the official link before you drive.