I-90 Road Conditions: Seattle to Spokane & Snoqualmie Pass

I-90 is the main interstate route between Seattle and Spokane, crossing the Cascades over Snoqualmie Pass at 3,022 feet and continuing east through Easton, Cle Elum, and Ellensburg. It is the busiest mountain crossing in Washington and the only year round interstate over the Cascades in the state.

That is why this page pairs live conditions with a guide. The cameras and status above tell you what is happening now, and the guide below helps you plan the drive.

WSDOT Traction Requirements on I-90

When snow falls, WSDOT posts traction requirements for the Snoqualmie Pass corridor. The requirement level tells you what your vehicle needs to cross the pass legally and safely.

Traction Tires Advised: Snow or ice is possible on the roadway. Approved traction tires are advised, and carrying chains is smart when a storm is on the way.

Traction Tires Required: All passenger vehicles must use approved traction tires. All wheel drive and four wheel drive vehicles may proceed on traction tires. Vehicles over 10,000 pounds gross weight must install chains.

Chains Required: All vehicles must install chains, except all wheel drive vehicles with approved traction tires, which may proceed but must carry chains. When conditions outrun the chain requirement, WSDOT closes the pass instead.