There are over 1,600 miles of wildland trails in the Mountains to Sound Greenway, giving the 3.3 million people in King, Kittitas, Snohomish and Pierce Counties access to magnificent recreation just outside the Seattle metropolitan area.

The Greenway Trails Program completes annual improvements and maintenance on over 100 miles of trails in the Greenway corridor along Interstate 90 each year. Greenway staff, conservation corps field crews and volunteers have rebuilt significant portions and made upgrades to icon trails including Mt. Si, West Tiger #3 and Rattlesnake Mountain Trail.

Working in partnership with land managers including WADNR, Washington State Parks, the City of Issaquah, City of Mercer Island, Seattle Public Utilities, Mount Baker Snoqualmie National Forest and King County, the Greenway Trust engages volunteers who donate over 12,000 hours each year to trail improvement projects.