endless discovery

Within Reach

Welcome to the Mountains to Sound Greenway National Heritage Area

The Mountains to Sound Greenway National Heritage Area is a unique geographic corridor made up of connected ecosystems and communities spanning 1.5 million acres from Seattle to Ellensburg along Interstate-90 in Washington state. The Mountains to Sound Greenway Trust is a coalition-based organization that leads and inspires action to conserve and enhance this special landscape, ensuring a long-term balance between people and nature.

Volunteers clearing brush from an area on a hill in front of a rock formation

Pitch in for our Public Lands on Sept. 24, 2022

On National Public Lands Day, we gather together around what we love most – our public lands. Join the Greenway Trust and partners on September 24th, 2022 for a day of stewardship and celebration in Kittitas County.

Join Us at an Upcoming Event

It’s back to school time!

For nearly 25 years, we have been engaging 4th-12th grade students in King County with high-quality, science-based outdoor learning opportunities that foster teamwork, nurture the imagination, increase students’ sense of ownership over their learning, and instill a conservation ethic.