Chinook Pass in Mount Rainier National Park, WA, Will Open for the 2022 Summer Season on Friday, June 10 After a much snowier-than-usual spring, SR 410 aka Chinook Pass in Mount Rainer National Park will open for the summer season this Friday, June 10. Crews have been working around the clock to clear the road of snow banks and are finally able to open it this week.ย The Washington State Department of Transportation shared on its Instagram account: “It […] Industry News SnowBrains | June 8, 2022 0 Comments