Travel Advisory SR 18 Closed from I-90 to Issaquah-Hobart Road Weekend of August 15

The Washington State Department of Transportation (WSDOT) will close SR 18 between I-90 and Issaquah-Hobart Road from 9 PM on August 15 until 5 AM on August 18, 2025. This closure aims to facilitate the widening of SR 18 and perform annual road maintenance over Tiger Mountain. Local residents and commuters are advised to plan alternative routes to avoid delays during this time. The annual maintenance includes critical safety upgrades, which are part of WSDOT's long-term infrastructure improvement strategy. WSDOT emphasizes the importance of this work for enhancing road safety and capacity in the rapidly growing region.

Drivers are encouraged to check for traffic updates and road conditions ahead of time. This closure reflects ongoing efforts to improve transportation infrastructure in Washington State. The agency aims to minimize disruptions and ensure safe travel for all users.