Spanning 100 miles from Seattle’s urban waterfront to the pastoral farmlands near Thorp, the Mountains to Sound Greenway traces one of Washington’s most dramatic landscape transitions. This National Scenic Byway follows I-90 through a stunning corridor where glittering Puget Sound views give way to towering evergreen forests, then climb through Snoqualmie Pass before descending into the sun-drenched valleys of eastern Washington.

Along the route, travelers encounter iconic stops including Snoqualmie Falls, where 268 feet of thundering cascade captivates visitors year-round. The Summit at Snoqualmie offers alpine recreation, while historic mining towns like Roslyn—famous as the filming location for “Northern Exposure”—invite exploration. Wine enthusiasts will appreciate the transition into the Yakima Valley appellation near Thorp.

The drive itself takes approximately two hours without stops, but allow a full day to properly experience the viewpoints, hiking trails, and small-town charm along the way. Spring brings wildflowers and waterfalls at peak flow, while autumn transforms the hillsides into a mosaic of gold and crimson. Winter travelers witness a snow-draped wonderland, though chains may be required over the pass.

This byway perfectly captures the Pacific Northwest’s essence—where urban sophistication meets untamed wilderness within a single, unforgettable drive.

Explore Nearby

• Alki Point Light — Lighthouse in Washington
• West Point Light — Lighthouse in Washington
• Fort Ward Park — State Park in Washington
• Blake Island Marine State Park — State Park in Washington
• Johnson Covered Bridge — Covered Bridge in Washington