Northern Tier Section 1 maps 4-5

[Retire70]

Highway 20 Closed in both directions with no re-opening date.

Description: Both directions of SR 20 will remain closed between Colonial Creek Campground (milepost 130) and Porcupine Creek (milepost 156) while repairs are completed. There is no estimate when this section of the North Cascades Highway will reopen. No public access is allowed in the area during the closure, including hiking, biking or camping.

More information on the project webpage.
Last updated: 04/30/2026 06:51 PM