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 has been working for 35 years to conserve and enhance this incredible landscape — building and maintaining trails, restoring wildlife habitat, and connecting youth to the outdoors through environmental education. Through our mission, we strive for a long-term balance between people and nature.

Adopt a Holiday Tree, Support Local Habitat Restoration!
Instead of cutting down a tree that’s used for a few short weeks, adopt a living Christmas tree from the Greenway Trust that will continue growing long after the holidays are over. Plus, your donation supports local habitat restoration while giving you the chance to help plant your tree in its permanent home this spring!
Join Us at an Upcoming Event
Read the Latest News











