Department of Transportation.
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.
Getting to the Byway:
* Take I-5 north to Seattle. * Merge onto I-90 east where the byway begins.
Navigating the Byway: