UPDATE MAY 7: Scaling work continues on a slope above SR 20 near Diablo Lake. Crews use hand tools, air compression (and a little muscle) to send loose rock down the slope.
SR 20 remains closed from MP 130-156. More info in our latest blog update bit.ly/SR20blog
@east.wsdot.wa.gov
Video
WSDOT North
UPDATE MAY 6: After getting equipment on site, our contractor began inspecting the slope and dislodging loose rocks and debris. This delicate process, called scaling, will continue for several days.
SR 20 remains closed from MP 130-156. No access for hiking, biking or camping.
@east.wsdot.wa.gov
WSDOT North
UPDATE MAY 5: We began work to stabilize the slope & clear debris on SR 20 near Diablo Lake (MP 131) today. This is the first of two emergency contracts needed to repair & reopen North Cascades Hwy.
SR 20 remains closed from MP 130-156. This INCLUDES bikers, hikers and campers.
WSDOT North
Please note SR 20/North Cascades Highway will remain closed from the west side at Colonial Creek Campground (MP 130) to Porcupine Creek (MP 156) until repairs are finished.
This closure INCLUDES no access for hikers, bikers and campers.
WSDOT North
Attention SR 20 travelers! The North Cascades Highway will PARTIALLY reopen TODAY at 2 p.m. from the east up to Porcupine Creek (MP 156). SR 20 will remain a work zone and closed to ALL public access 24/7 from MPs 156-130. Check out our blog: wsdotblog.blogspot.com/2026/04/nort...
