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Home News Blog Hiker Headlines: Closures on Highway 20, at Heybrook Ridge Park and state parks

Hiker Headlines: Closures on Highway 20, at Heybrook Ridge Park and state parks

Posted by tiffanyc at Mar 19, 2026 01:34 PM |
Filed under: Hiker News, State Park, North Cascades

Several closures are in place after recent storms and other issues, including on Highway 20 and multiple state parks. Heybrook Ridge Park is also closed for a few months for construction. Cascade Backcountry Alliance is asking you to share your experience winter recreating in the Snoqualmie Pass region. And, keep an eye out for the Washington State Department of Ecology's new mascot for their "We Keep WA Litter Free" campaign.

It’s March 19. Several closures are in place after recent storms and other issues, including on Highway 20 and multiple state parks. Heybrook Ridge Park is also closed for a few months for construction. Cascade Backcountry Alliance is asking you to share your experience winter recreating in the Snoqualmie Pass region. And, keep an eye out for the Washington State Department of Ecology's new mascot for their "We Keep WA Litter Free" campaign. Here’s some news you may have missed while out on trail this week.

A large rock fall slide on Highway 20. Photo by the Washington State Department of Transportation (WSDOT).
Highway 20 is closed at milepost 30 near Diablo Lake due to a rock slide until further notice. Photo courtesy of the Washington State Department of Transportation.

Highway 20 closure: Highway 20 (the North Cascades Highway) is closed at Colonial Creek Campground near Diablo Lake (milepost 130) until further notice due to a major rock fall. This is about 4 miles west of the western end of the Highway 20 winter closure, which starts at the Ross Dam trailhead.

Heybrook Ridge Park closure: Heybrook Ridge Park is currently closed for construction, which includes the Heybrook Ridge and Erinswood trails, as well as the trailhead. Construction is focused on the ADA-compliant Erinswood trail. The closure is expected to last through June. 

State park closures: Be aware of multiple Washington State Park closures due to recent storms:

Share your Snoqualmie Pass experiences: Cascade Backcountry Alliance wants to know how you spend your time in the Snoqualmie Pass backcountry during the wintertime! Learn more about its trailhead survey to help the alliance gather information about how winter recreators utilize the area’s trails and trailheads.

"We Keep WA Litter Free" marmot: The Washington State Department of Ecology has a new spokesperson with a message: Help keep Washington litter-free! Keep an eye out for the Department of Ecology's new commercials, starring a marmot puppet, encouraging folks to keep litter off our roads and public spaces. 


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