Mountains to Sound Greenway - I-90

National Scenic BywayWashington
Length 100.0 mi / 160.9 km
Time to Allow 1.5 to 2 hours to drive the byway.

There are no fees along the byway proper.

Drive east from Seattle on I-90 through pastoral valleys, lush forests and a dramatic mountain landscape. Visit historic towns and scenic spots for forest walks or challenging hikes. Cross the Cascades into a drier climate where coal mining built pioneer towns on the way to the Columbia River.

Local Information

Washington State Tourism Div.