Mountains to Sound Greenway

Mountains to Sound Greenway Interstate 90 over Snoqualmie Pass in the state of Washington, is unique in the Interstate Highway system in the US, in that it is a designated National Scenic Byway. The Mountains To Sound Greenway Trust has acted to protect the route of I-90 from Seattle to Thorp, WA, which is the portion of I-90 through the Cascade Mountain Range.

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Mountains to Sound Greenway Travel Guide
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Mountains to Sound Greenway Travel Guide is based on Mountains to Sound Greenway by Bill Ellett, Ryan Holliday, Eric Polk, David, Philip Fenner, Michele Ann Jenkins, Tom Holland, Morph, Jonboy, iGuide and others. Mountains to Sound Greenway Travel Guide is available under Creative Commons Attribution-ShareAlike 3.0. See background image credits.