Cedar River Trail

Cedar River Trail
Name	Cedar River Trail
Location	King County, Washington, United States
Length mi	17.3
Use	Hiking, Bicycling, Horseback Riding
Surface	Gravel, Dirt
Season	Year-round
Highlights	Cedar River, Rattlesnake Lake, Landsburg, Chester Morse Lake

Cedar River Trail

The Cedar River Trail is a multiuse recreational corridor in King County, Washington, linking Renton (Washington), Maple Valley, Washington, and communities near Rattlesnake Lake and Chester Morse Lake. Originally developed along historic transportation and utility corridors associated with the Cedar River (Washington), the trail now provides access to municipal watershed infrastructure, regional parks operated by King County, Washington, and trail networks connected to Mount Rainier National Park approaches and the Issaquah Alps. The corridor is frequented by residents from Seattle, Bellevue, Washington, and visitors traveling via Interstate 405 and Washington State Route 169.

Description

The trail follows the course of the Cedar River (Washington), paralleling water supply infrastructure linked to the Seattle Public Utilities system and views toward Tiger Mountain and the Snoqualmie Valley. The surface varies from compacted gravel to native dirt, reflecting maintenance by King County Parks and Recreation and collaborative agreements with the City of Renton and Seattle Public Utilities. The corridor traverses riparian floodplains near Rattlesnake Lake Recreation Area, engineered reservoirs such as Chester Morse Lake, and former railroad grades associated with Northern Pacific Railway and regional logging roads used during the era of the Pacific Northwest logging industry.

Route and Access

Trailheads are accessible from Renton, Washington near Gene Coulon Memorial Beach Park and from the eastern trailhead at Landsburg, Washington near County Road 261. Parking and access points connect with Rattlesnake Lake Trailhead adjacent to the Rattlesnake Ledge approaches and link to the Snoqualmie Valley Trail via regional connector routes. The corridor crosses or parallels arterial roads including Interstate 5, State Route 18, and State Route 169, and is served by transit routes from King County Metro and park-and-ride facilities used by riders commuting to Seattle–Tacoma International Airport and downtown Seattle. Seasonal closures or permits may be required in segments abutting the Chester Morse Lake municipal watershed managed by Seattle Public Utilities.

History

The alignment follows nineteenth- and early twentieth-century transport infrastructure developed during expansion periods associated with Seattle municipal water development and the timber boom led by companies such as Weyerhaeuser and Boise Cascade. Early railbeds and access roads were used to build and service the Chester Morse Lake impoundment and related dams constructed under early Seattle waterworks projects. Conservation and recreation planning in the late twentieth century involved collaborations among King County, the City of Renton, and regional land trusts such as the Sierra Club and local chapters of the Washington Trails Association, culminating in trail conversions and formal designation as a multiuse corridor.

Natural Environment and Wildlife

The riparian corridor hosts native plant communities typical of the Puget Sound region including stands of western redcedar near shorelines influenced by the Cedar River estuary system, mixed conifer forests with Douglas fir and western hemlock, and understory shrubs such as salal and huckleberry. Wildlife observed along the corridor includes black-tailed deer, black bears noted in regional reports by Washington Department of Fish and Wildlife, bald eagles nesting in mature trees monitored by Audubon Society (United States), and salmonid runs—Chinook and coho—documented in tributary surveys associated with Cedar River Sockeye Restoration initiatives. Wetland patches provide habitat for amphibians tracked by researchers at institutions like the University of Washington.

Recreation and Amenities

Users engage in hiking, road and mountain bicycling, equestrian use authorized on designated segments, birdwatching popularized by local chapters of the Audubon Society (United States), and seasonal fishing regulated by Washington Department of Fish and Wildlife rules. Trail amenities include interpretive signage produced with input from Seattle Public Utilities, trail bridges and culverts maintained under agreements with King County Roads Division, picnic areas adjacent to Rattlesnake Lake Recreation Area, and connections to regional trail systems promoted by the Washington State Parks and Recreation Commission and Friends of the Cedar River Trail volunteer groups.

Management and Conservation

Management is coordinated among King County Parks and Recreation, the City of Renton, and Seattle Public Utilities under memoranda that address watershed protection, invasive species control involving organizations like Washington Invasive Species Council, and public safety planning with King County Sheriff’s Office and local fire districts such as Valley Regional Fire Authority. Conservation efforts tie into broader Puget Sound partnerships including WRIA 8 (Cedar-Sammamish) salmon recovery plans, with funding and scientific support from agencies such as the National Oceanic and Atmospheric Administration and the U.S. Fish and Wildlife Service for habitat restoration projects.

Incidents and Safety

Trail safety protocols reference emergency response coordination with King County Search and Rescue teams and incident reporting routed through King County 911 and local park dispatch centers. Notable incidents in the corridor have involved seasonal flooding linked to heavy precipitation events tracked by the National Weather Service and occasional wildlife encounters recorded by Washington Department of Fish and Wildlife advisories; these inform posted closures and public education campaigns developed jointly with Washington Trails Association and local municipalities.

Category:Trails in Washington (state) Category:Protected areas of King County, Washington