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The King County Open Space Plan: Parks, Trails, and Natural Areas (Open Space Plan) is a functional plan of the King County Comprehensive Plan. Updated every six years, it provides the policy framework for the county's acquisition, planning, development, stewardship, maintenance, management, and funding of its complex system of 205 parks, 175 miles of regional trails, and 32,000 acres of open space. It enables King County to be eligible for certain federal and state grants, such as from the state Recreation and Conservation Office. This plan must be adopted by the King County Council.

King County Parks is currently developing the 2022 update to its Open Space Plan.

2022 Update - Timeline

Conduct internal review        

Q2 - Q4 2021

Gather public input
Q3 2021
Present public review draft
(including SEPA)
Q4 2021 - Q1 2022
Finalize draft plan
Q1 2022
Transmit draft plan to King County Council 
Q1 2022
Council review and adoption
Q1 - Q2 2022


The 2016 update to the Open Space Plan was adopted by the King County Council on June 27, 2016. The 2016 Open Space Plan was informed by the planning efforts and public processes of previous documents, such as the King County Parks Levy Task Force Report (2012), the Parks Business Transition Plan (2002), the Regional Trails Inventory and Implementation Guidelines (2004), and the King County Comprehensive Plan.