Skip to main content
King County logo

Through our Capital Improvement Program (CIP), we are building new and enhancing existing recreation amenities while caring for all of the assets in our 28,000-acre system of parks and trails. Unless otherwise specified, these projects are funded in part or in whole by the 2014 - 2019 King County Parks, Trails, and Open Space Replacement Levy. Thanks for your support!

The list below reflects key current CIP projects, but we've got more than 300 projects in the hopper at any given time. If you don't see a particular project listed, please contact with questions.

Related: CPG Projects.

Bridge and Trestle Program

There are 94 bridges and trestles in King County's Regional Trails System, including 41 spans that are now more than 90 years old. King County Parks inspects, monitors, load rates, repairs, and replaces these structures on an on-going basis.

In our 2014-2019 Levy we committed to repairing or replacing 14 bridges and trestles on our regional trails. By the end of 2017 we completed repairs and replacements on all 14of these bridges including:

  • A major rehabilitation on the 400-foot Tokul Creek bridge
  • Replacement of the Snoqualmie Valley Trail #40 bridge near Mt. Si Golf Course
  • Significant stringer and cap repairs to the numerous trestles along the Snoqualmie Valley and Cedar River Trails
  • A significant scour repair project on the Sammamish River Trail

For the remainder of the levy, we will continue to inspect and load rate our bridges, as well as  respond to immediate need projects such as scour repair and tree damage.  We will also work on planning and implementing several rehabilitation and replacement projects  including:

  • Replacement of the trail bridge that leads into Remlinger Farm near Carnation
  • Design of a replacement structure for the #2 bridge on the Preston-Snoqualmie Trail (near Lake Alice Rd.)
  • Various Tolt-MacDonald Park Suspension Bridge Repairs

Dockton Park Dock Rehabilitation

Funded in part by a grant from the state Boating Facilities Program, this project will replace and repair piles, install additional flotation to stabilize the dock, replace cross-bracing on the fixed pier and hinge points on the finger piers, and install a new sewer pump station, water lines on the fixed dock, and signage.
This project is currently in design and scheduled for construction in 2019. 

Project Manager:  Deena Hall

Building Structures Program

With 200 parks, 22 restrooms, 26 picnic shelters, and 3 historic buildings, it takes a lot of on-going maintenance to keep our facilities operating safely and efficiently so they can remain open for the public to enjoy.

On-going assessment, evaluation, rehabilitation or replacement of existing park buildings, facilities and systems in order to ensure safety of the public and staff. Examples of general facility maintenance includes repairing roofs and restrooms, re-surfacing sidewalks and walkways, and maintaining building systems (ex: HVAC).

Preston Community Center - Roof Replacement
Facility Closure: Sept 17 - Oct 16

King County Parks is replacing the roof and repairing other infrastructure on the Preston Community Center. The King County Landmarks Commission has approved this project. We are replacing the wood shingles with EcoStar shingles, which mimic the size, shape and texture of a wood shingle, but are made of recycled rubber and plastic and have a fifty year warranty. Other elements of this project include installing new flashing, repairing and securing a few existing knee braces, and installing new gutters. Weekend work may be necessary in order to complete the project in a timely manner.

Project Manager: Jason Anglin

Completed projects include:

  • Gracie Hansen Roof Replacement
  • Tolt Barn Siding Replacement
  • Tolt Barn Roof Replacement

Upcoming projects include:

  • Cougar Squak Corridor Water Supply Replacement and Treatment System – Project Manager: Brenda Bradford

Burke-Gilman Trail - Lake Forest Park Improvements

This project is now complete. Read more about the completed Burke-Gilman Trail Lake Forest Park improvements.

Central Maintenance Facility (Renton Shop)

Design and construction to replace the facilities, utilities, and yard storage areas at Parks’ existing operations headquarters (3005 NE 4th Street, Renton). Project includes re-development of approximately 5.7 acres with a new shop and crew spaces, vehicle and equipment parking, and yard/materials storage.

Parks issued a Determination of Non-Significance (DNS) under the State Environmental Policy Act (SEPA). Comments accepted until 4:30 pm on Dec 20, 2018. Click here for SEPA information.

Project Documents

King County Parks is issuing a Notice of Action Taken (NAT) for the King County Parks – Renton Shop project. As described in the NAT any action to set aside, enjoin, review, or otherwise challenge such action on the grounds of non-compliance with the provisions of chapter 43.21C RCW (State Environmental Policy Act) shall be commenced on or before March 28, 2019.

Notice of Action Taken (NAT)

Want more information? View project information here.  


  • Design and permitting 2018 - 2019
  • Construction – 2020 - 2022

Project Manager: Brenda Bradford

Cougar Mountain Regional Wildland Park – Big Tree Ridge (Cougar Precipice) Trailhead

Funded in part by the Washington Wildlife and Recreation Program and the 2014-2019 King County Parks, Trails, and Open Space Replacement Levy, this project will construct a new trailhead serving the northeast part of Cougar Mountain Regional Wildlife Park, off of Newport Way NW and will be the first new parking lot at the park since the 1990s. Project elements include construction of a 40-vehicle parking lot and installation of trailhead amenities, such as a restroom, bike racks, picnic tables, and an informational kiosk. This trailhead will access the existing Big Tree Ridge Trail, which connects to the park’s 36 miles of trails.


  • Fall/Winter 2017 – Preliminary Design
  • Late Spring/Summer 2018 – Permitting
  • Fall/Winter 2018-2019 – Final Design
  • Late Summer/Fall 2019 – Construction

Project Manager: Linda Frkuska

Cougar/Squak Corridor Trailhead

Funded by the 2014-2019 King County Parks, Trails, and Open Space Replacement Levy, this project will renovate and expand the existing trailhead and parking lot at Cougar/Squak Corridor, which serves the popular Margaret's Way Trail.

The first phase of the project will include demolition of the existing lodge, office building, and several sheds. Campground remnants from the former property owners will be removed and restored with native vegetation. The existing parking lot will be redesigned to allow for more vehicle capacity and efficiency. Other project elements include installing a restroom, signage, landscaping, storm drainage, and mitigation plantings. Construction is anticipated to begin Spring 2019, depending on permitting.

The second phase will include installation of a natural play area and gathering space, an outdoor shelter, and an additional parking lot (if needed). Timing of the second phase of construction of is yet to be determined.

Project Manager: Linda Frkuska

Derby Creek Flood Reduction and Enhancement Project

This project will alleviate seasonal flooding of the Northshore Athletic Fields and remove two fish barriers by reconstructing approximately 800 feet of sediment-laden stream channel and replacing failing, undersized, fish barrier culverts, one under the Sammamish River Trail and another in the athletic fields. Similar stream channel reconstruction has already occurred in Derby Creek upstream. This project will complete the downstream portion of Derby Creek, connecting it all the way to the Sammamish River. 


The following technical documents are available for this project:


The project is currently in the final design phase, which is funded in part by the King County Flood Control District. Permit applications will be submitted in Summer 2018. Construction of the project is dependent on permit issuance and available funding. King County Parks is pursuing possible partnerships to construct the improvements, but the construction date is still to be determined.


Project Manager:Lindsey Miller

Dockton Park Dock Rehabilitation

Funded in part by a grant from the state Boating Facilities Program, this project will replace and repair piles, install additional flotation to stabilize the dock, replace cross-bracing on the fixed pier and hinge points on the finger piers, and install a new sewer pump station, water lines on the dock, and signage.
This project is currently in design and scheduled for construction in 2019.

Project Manager: Deena Hall

East Lake Sammamish Trail

Eastside Rail Corridor Trail

Foothills Trail

King County Parks is initiating the design and construction of a one-mile segment of the Foothills Trail (formerly known as the Enumclaw Plateau Trail) along right-of-way owned by King County Parks. The trail segment begins at 252nd Avenue South, just outside and south of Enumclaw, and continues along a former railroad route to its terminus just north of Mud Mountain Road. King County Parks is working with the Cities of Enumclaw and Buckley to construct a bridge across the White River to connect both sides of the Foothills Trail.

King County Parks completed Phase I in 2010 of Foothill Trail development, constructing a soft surface trail on a one-mile segment of the trail from 252nd Ave S to just north of Mud Mountain Road near Enumclaw. Phase I also included improving the crossing at 252nd Ave S and installing a new pedestrian footbridge over a small stream that bisects the trail.

Read the 2008 White River Bridge feasibility study.


Foothills 60% Project Design Plans:

Project Manager: Chris Erickson

Green River Trail - North Extension

Green to Cedar Rivers Trail

Lake to Sound Trail

Marymoor Park

As our most popular park, Marymoor sees more than three million visitors every year, and with so many diverse recreation opportunities and historic facilities located there, King County Parks has on-going efforts to repair and improvement the park’s amenities and infrastructure.

CIP projects include:

  • Concert stage roof repair - completed in 2015

  • Concert pathway upgrade for ADA access - completed in 2016

  • Added netting at baseball field #1 to prevent foul balls from landing in the play area - completed in 2016

  • Electrical and utilities upgrades at parking lot D - completed in 2016

  • Concert seating area flooring – completed in 2017

  • Parking lot B entrance widening – completed in 2017

  • Replacement of synthetic turf on soccer fields – completed in 2017

  • Habitat restoration mitigation and monitoring for the Connector Trail (on-going)

Upcoming projects include:

  • Install new pay stations and parking enforcement system - currently in planning/pre-design phases, to be completed in 2017-18
  • Park office roof repairs - Anticipated for 2017-18
  • Installation of security system - anticipated for planning and design in 2017-18
  • Upgrades to ADA pathways and lights - anticipated for planning and design in 2017-18
  • Audubon trail pavement repair – anticipated for 2017-2018

Project Manager: Annie Mathews

Marymoor Park Office Improvements

Feasibility and planning for renovation and addition to the Historical “Cottage” which functions as the administrative headquarters for the Park.

Estimated timeline for completion:

  • Planning – Fall 2017

Project Manager: Jennifer Kim

Mukai Cold Process Fruit Barreling Plant

King County recently purchased the Mukai Cold Process Fruit Barreling Plant, located on Vashon Island, in order to permanently protect this historic structure.The County intends to enter into a lease agreement with Friends of Mukai, a nonprofit organization that controls the adjacent historic Mukai House and Garden. Project work includes assessment, evaluation, and interim repairs to stabilize the structure to prevent further deterioration.

Estimated timeline for completion:

  • Construction Winter – 2018-2019

Project Manager: Brenda Bradford

Maury Island Natural Area Remediation

King County Parks is coordinating with Washington State Department of Ecology to clean-up contaminated soil at Maury Island Natural Area. Air pollution from the Tacoma Asarco smelter settled on parts of King, Pierce, Kitsap, and Thurston counties, creating the Tacoma Smelter Plume. High concentrations of arsenic and lead from the smelter operations have been found in the Natural Area.

Read more about the Maury Island Natural Area remediation project.

Project Manager: Lindsey Miller

Pathway and Parking Lot Surface Repairs

King County Parks is continuously repairing and improving the pathways, sidewalks and parking lots within our system of 200 parks. Repair work includes spot pavement repairs, removing tree roots and installing root barriers, controlling erosion, paving, and site restoration. This work typically doesn't require closure of park facilities.

Current projects:

  • Cougar Mountain: Whittaker Trailhead and Parking Lot repairs - June 11-15. Read the press release.
  • Cottage Lake Park: Pathway repairs (multiple locations) - June 4-14.
  • Sammamish River Trail: Pathway repairs between 102nd AveNE and bridge 2156-6 - TBD (partial closure necessary)

Project Manager: Jorge Sanchez

Pinnacle Peak Trailhead Development

Funded in part by a grant from the Washington Wildlife and Recreation Program, this project constructed a 50-vehicle parking lot and trailhead amenities on the south side of the park along SE Mud Mountain Rd. Other project elements include constructing a one-half mile-long access trail and bridge that connects to the existing trail network and restoring pastureland.

Update June 2018: Construction of the parking lot is now complete and the lot is open to the public. The connector trail requires additional work, which will be completed this summer. We will also install a wooden pedestrian bridge and widen the connector trail. We anticipate completing this work this summer, pending permits.

Project Documents

Project Manager: Linda Frkuska

Play Area Rehabilitation

There are 29 play areas in parks throughout King County’s system. King County Parks conducts annual safety inspections and removes, replaces and/or modifies play areas as needed for safety and life cycle maintenance. Each play area rehabilitation project takes approximately 8 to 10 weeks to construct; however, construction is weather dependent and is subject to change. The current levy funds rehabilitation of 13 play areas through 2019.

Completed projects include:

  • South County Ballfields – Completed in August 2015
  • Cottage Lake Park – Completed in March 2016
  • Five Mile Lake Park – Completed in April 2016
  • Ravensdale Park – Completed in June 2016
  • Tolt MacDonald Park – Completed in September 2016
  • Big Finn Hill Park - Completed in December 2016
  • Coalfield Park - Completed in June 2017
  • Mayrmoor Park (south play area) - Completed May 2018

Upcoming projects include:

  • Dick Thurnau Memorial Park - Play area and picnic shelter closed as of June 4, 2018. Estimated project completion - Sept 2018.
  • Redmond Ridge Park - Fall 2018
  • Petrovitsky Park (two play areas) - 2019

*Note: Skyway Park – Play area replacement is part of a larger park improvement project. See below.

Estimated project budget for 2017-2018: $1.03 million

Project Manager: Lindsey Miller

Regional Trails System Improvements

With 175 miles of regional trails, King County Parks is continuously repairing and improving our existing paved and soft surface trails and other trail amenities. Surface repairs, such as removing tree roots, leveling bumpy patches, and replacing worn out areas, are on-going and sometimes require brief trail closures.

2017 projects included:

  • Soos Creek Trail asphalt overlay
  • Sammamish River Trail surface repairs
  • Issaquah to High Point Trail soft surface improvements
  • Other emergent repairs throughout the system as needed

This program will be extended in 2018 with additional pavement overlays in other areas throughout the Regional Trails System.

Project Manager: Jorge Sanchez

Skyway Park

King County Parks is in the design phase for a project to improve recreation and sports facilities at Skyway Park.
This project will include the following elements:

  • enhancing and expanding the play area
  • adding a pre-fabricated modular outdoor mini soccer arena
  • adding adult fitness equipment
  • adding a sand volleyball court
  • adding on-demand lighting to the sports court
  • improving the parking lot and pathway
  • repairing existing sports facilities throughout the park

Construction will likely start in late 2019 and extend into 2020. This project is funded by King County Parks' Youth and Amateur Sports Grants program and by a grant from the National Parks Service administered by the Washington State Recreation and Conservation Office.  The following documentation is available for this project:

Budget: $1.3 million
Project Manager: Mary Lear 


Soos Creek Trail

[Coming Soon]

Steve Cox Memorial Park

As one of the oldest sites in the system and a much-loved park, Steve Cox Memorial Park requires on-going repair and upkeep for the safety and operation of the park’s buildings and other recreational facilities.

Sign up for the park e-newsletter (low traffic) to stay up-to-date on what's happening in the park!

Current projects

Synthetic turf field conversion and other improvements of Fields #2 and #3

The project will construct a multi-use synthetic turf athletic field with LED lights and a ten-foot-wide paved walking path around the field perimeter. The field in-fill will be a rubber turf material coated with a colorant and encapsulated with a polyurethane coating. This material was selected to help reduce on-field temperatures and the overall environmental impact of the in-fill. 

Read the project brochure (English / Spanish) for more information.

Timeline: We anticipate going to construction in Summer 2018 and completing the project in October 2018.

Budget: $3.1 million

Recent Projects

  • Upgrade fiber optic network in buildings (Summer 2017)
  • Install underground electrical power to field house (Summer 2017)
  • Repair and repave parking lot; repair sidewalk; install ADA ramps (Spring 2017)
  • Renovate stadium (Spring 2017)
  • Install LED lights to outdoor basketball courts (Fall 2015)
  • Replace roof of racquetball building (Spring 2015)

Project Manager: Tri Ong

Weyerhaeuser King County Aquatic Center

With three pools, locker rooms, a banquet hall, concession area and 2,500-seat natatorium, the WKCAC is one of the nation’s premier swimming and diving facilities and requires on-going upkeep by King County Parks. Recent upgrades have included installing energy efficient lighting and scoreboard, replacing the HVAC system, repainting the pools, and improving the locker rooms.

2016 rehabilitation projects included:

  • Replacing starting blocks
  • Resurfacing bulkheads
  • Other general on-going maintenance and upkeep

Project Manager: Mari Gregg