Signs along the “east side” of the Black Diamond Open Space indicate its favored status among mountain bikers. On the “west side” the ladder bridge spans a peaceful stretch of Ravensdale Creek. Photo by Kevin Hanson

King County adds acreage to Black Diamond Open Space

Now’s your chance to tell the county what it should do with the new 56 acres.

The Black Diamond Open Space just got a little bit bigger.

King County announced Jan. 29 that an additional 56 acres were added to the 1,240-acre recreation area just north of Black Diamond.

“We are excited to add this beautiful area to Black Diamond Open Space, which helps us expand recreational opportunities in the area, while also contributing to King County’s ambitious goals of land conservation, climate resilience, clean water, and healthy habitat,” King County Parks Division Director Warren Jimenez said in a press release.

The additional acreage was given to the county by the building company Lennar through King County’s Four to One Program, which allows a landowner to add 20 percent of their land to the urban growth area if they donate 80 percent as open space.

This allows Lennar and other landowners access to greater zoning density than they’d get just building in unincorporated King County, allowing more people to live in an area.

Participating in the program is also allowing Lennar to develop the 14-acre Tahoma Ridge housing community right next to the Black Diamond Open Space.

“Lennar representatives say contributing to a vibrant community by enhancing parks and open space through King County’s Four to One Program align with the company’s core values, and the 56 acres the company is setting aside as open space will no doubt be enjoyed by local residents and others from all over King County for generations to come,” the press release reads.

King County Parks needs to check the area out before opening the new portion of the open space for public use. However, this gives the public time to inform King County Parks what should be done with the new acreage.

To give your input, head to The survey takes approximately five minutes to complete and will be open until Monday, Feb. 15.

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