Landslide Shuts Down Eastbound SR 18 Near Tiger Mountain Summit

Closure expected to last indefinitely as crews work to clear the roadway

Mar. 16, 2026 at 10:08pm

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A small landslide has closed a portion of eastbound State Route 18 (SR 18) near Tiger Mountain Summit in Hobart, Washington. The closure occurred on Monday afternoon, with the Washington State Patrol advising travelers to seek alternate routes as there is currently no estimated time for the roadway to be cleared and reopened.

Why it matters

This closure on a major highway near Seattle will likely cause significant traffic delays and disruptions for commuters and travelers in the area, underscoring the need for infrastructure maintenance and preparedness for natural disasters that can impact critical transportation routes.

The details

According to the Washington State Patrol, the landslide shut down eastbound SR 18 at the Issaquah and Hobart Road intersection. Trooper Rick Johnson reported the closure around 1 p.m. on Monday, advising drivers to use alternate routes as there is currently no estimated time for the roadway to be cleared and reopened.

  • The landslide occurred on Monday, March 16, 2026 around 1 p.m.

The players

Washington State Patrol

The law enforcement agency responsible for responding to the landslide and managing the road closure.

Trooper Rick Johnson

A Washington State Patrol trooper who announced the closure of eastbound SR 18 on Twitter.

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What’s next

Crews will need to assess the extent of the landslide and clear any debris from the roadway before eastbound SR 18 can be reopened to traffic.

The takeaway

This incident highlights the vulnerability of critical transportation infrastructure to natural disasters and the importance of proactive maintenance and emergency response planning to minimize disruptions for commuters and travelers.