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Mountains to Sound Greenway Trust - Connecting Ecosystems & Communities

  • ️Tue Mar 04 2025

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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.

Protect Our Forests, Protect the Greenway

Thousands of federal employees across the country have been terminated—these firings are unprecedented and the impacts of this crisis are already visible. Stand up for public lands, wildlife, and the people who ensure our continued access to these beloved places.

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