In January 2009 the Washington State Parks and Recreation Commission completed a land-use plan for Lake Chelan and Twenty-five Mile Creek State Parks.
In August 2007 Washington State Parks adopted a conceptual redevelopment plan for Lake Sammamish State Park.
In September 2010 Washington State Park has completed a land-use plan for Lake Sylvia State Park in Grays Harbor County and Schafer State Park in Mason County.
In October 2009 Washington State Parks and Recreation Commission approved the land-use plan for Lake Wenatchee State Park.
In 2016 Washington State Parks completed a land-use planning project for Larrabee State Park located in Whatcom and Skagit Counties. The planning project, also known as Classification and Management Planning (CAMP), addressed protection of natural and cultural resources, management of recreation and trail activities, and ways to best preserve and interpret the historic components of the park.
In March 2009 Washington State Parks completed a land-use plan for the Long Beach Area state parks, including Fort Columbia, Pacific Pines, Leadbetter Point, Loomis Lake, Skating Lake, the Seashore Conservation Area, and Colbert House properties, in Pacific County near the City of Long Beach.
Washington State Parks has completed a land-use planning project for Belfair, Twanoh, and Potlatch State Parks.
In 2005, State Parks began a six-year project to establish one of Washington’s next destination state parks at Miller Peninsula, near Sequim.
On December 8, 2014 Washington State Parks Director, Don Hoch approved the finalized Interim Trail Plan. The planning effort was a follow up to the Miller Peninsula State Park Property Initial Trail Identification and Designation.
In December 2002 a planning project for Millersylvania State Park was completed.
The Washington State Parks and Recreation Commission approved a management plan on February 14, 2000.
On March 22, 2018 the Washington State Parks and Recreation Commission approved a long-term boundary expansion for Moran and Obstruction Pass State Parks on Orcas Island, to include three properties totaling approximately 358 additional acres.
On January 29,2015, the Washington State Parks and Recreation Commission approved policies on non-recreational motorized use of state park long-distance trail corridors.
Washington State Parks has completed a land-use planning project for Mount Spokane State Park in Spokane County.
In November 2014, Washington State Parks approved a revision to the 2009 Comprehensive Trail Plan for Mount Spokane State Park.
Mount Spokane State Park is the largest park in the state park system at approximately 13,000 acres. Within the park, the Washington State Parks and Recreation Commission (Commission) has authorized an existing alpine ski area known as the Mount Spokane Ski and Snowboard Park that is currently operated under a concession agreement with a Spokane area non-profit known as Mount Spokane 2000 (MS 2000). The existing ski concession area encompasses 1425 acres or about 10% of the park.