Photo by Jason Hummel Photography


The Mountains to Sound Greenway National Heritage Area (Greenway NHA) is a diverse landscape stretching 100 miles from Seattle to Ellensburg along Interstate-90 (a National Scenic Byway) in Washington state. There are endless ways to explore this nationally-significant landscape, from discovering stories of our history and heritage; enjoying world-class recreational opportunities; visiting small towns and vibrant cities; and so much more.  

Check out our interactive map and trip-planning resources below to spark ideas for your next adventure out in the Greenway NHA. Whether it’s your first visit or you’ve lived here your entire life, there’s always something new to learn and experience!  

Plan Your Visit

Looking for inspiration to help you get out in the Greenway NHA? Our tours and itineraries are a great place to start! Or you can dive right into one of our four distinct regions: Urban Communities, Snoqualmie River Valley, Middle Fork Snoqualmie Valley, and the Upper Yakima Basin.

Wondering how you can get around in the Greenway NHA? Check out this page for information on public transit, wheelchair-accessible adventures, bike share options, and more.

Learn something new about the Greenway NHA

Every place has a story. We invite you to get out and explore the Greenway NHA and encourage you to go deeper. Be curious. Discover stories of our history and heritage. Wonder who came before you. Learn how places came to be. Respect and care for this landscape, for today and for the future.

Person walking on a log in the woods

Recreate Responsibly

#RecreateResponsibly to stay safe and care for our beloved outdoor spaces.

Passes and Permits

Your guide to local recreation passes and permits.

Explore the Greenway Trips

Unique, behind-the-scenes opportunities to explore the Greenway NHA.

Hit the Open Road

The Mountains to Sound Greenway on Interstate 90 was the first interstate highway in the United States to be designated as a National Scenic Byway.