Skip to main content
King County logo


Natural Resources and Parks
Public Affairs

Partnership delivers new trail system, access at King County Parks’ Black Diamond Open Space


King County Parks and Evergreen Mountain Bike Alliance are celebrating the completion of nearly eight miles of mountain bike trails, along with a new trailhead, at Black Diamond Open Space.


Mountain bikers, trail runners, and otherbdos_trailhead_2016 outdoors enthusiasts now have nearly eight miles of new trails that wind through King County’s Black Diamond Open Space – thanks to a partnership between King County Parks and Evergreen Mountain Bike Alliance (EMBA).

Access to the recently completed trails network is through a newly built parking lot and trailhead, just off State Route 169, near the City of Black Diamond. The parking lot was made possible by the voter-approved 2014-19 King County Parks, Trails and Open Space Replacement Levy.

King County Parks contributed $80,000 to this project through its Youth Sports Facilities Grant and Community Partnerships and Grants programs, while EMBA provided more than 2,000 volunteer work hours to build and improve the trails, with help from a $10,000 grant from REI.

Located just north of the city of Black Diamond, the Black Diamond Open Space is comprised of multiple sites totaling 1,100 acres owned by King County Parks and another 80 acres in conservation easement.

# # #

About King County Parks
King County Parks - Your Big Backyard - offers more than 200 parks and 28,000 acres of open space, including such regional treasures as Marymoor Park and Cougar Mountain Regional Wildland Park, 175 miles of regional trails, 215 miles of backcountry trails and a world-class aquatic center. By cultivating strong relationships with non-profit, corporate and community partners, King County Parks enhances park amenities while reducing costs.