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Noxious weeds

King County, Washington

To offer a suggestion or report an error on the King County Noxious Weeds website, please contact Sasha Shaw, education specialist.

Upper Snoqualmie weed watcher program 

Weed Watcher Online Reporting Site

  • To sign up for trainings, adopt trails, enter and edit survey and weed data, and view data.

Project description

Mid Fork Snoqualmie Valley - contact Mark Boyer for permission to use photoPlant enthusiasts, hikers and others who want to help protect our natural areas are encouraged to join the effort to locate (and control) invasive species in the beautiful Middle Fork Snoqualmie Valley and the Snoqualmie Pass Gateway trails of the South Fork Snoqualmie.

The Middle Fork-South Fork invasive weed project trains volunteers to survey along the beautiful trails of the Middle Fork Snoqualmie Valley and in the upper South Fork Snoqualmie watershed. Help survey the area's spectacular trail system for invasive weeds so we can stop them before they get entrenched. We’re surveying trails from Mt. Si near North Bend to Dutch Miller Gap in the heart of the Alpine Lakes Wilderness.  Read the project reports below to see what we've found so far. For more information, email Mark Boyar or Sasha Shaw.  To find out about weed removal work parties in the Middle Fork, contact Katie Woolsey with Washington Department of Natural Resources or the Mountains to Sound Greenway Trust.

Sign up and report data

Project resources2009 Map of Invasive Plant and Noxious Weed Surveys in the South and Middle Fork Snoqualmie River Basins - click for larger image

Note: You will need Acrobat Viewer to read most of these files. Download times are based on a 56K modem.

Training video (2013)


Weed IdentificationWeed_Watcher_Photo



Project Contacts

Mark Boyar, Volunteer, Mountains to Sound Greenway Trust, 206-760-9041,

Sasha Shaw, Education Specialist, King County Noxious Weed Control Program, 206-477-4824,

Carrie Schreiber, Botanist, Mt. Baker Snoqualmie National Forest, 425-888-8753

Katie Woolsey, Natural Areas and State Lands Steward, South Puget Sound Region, Snoqualmie Corridor,  Washington State Department of Natural Resources (DNR), (206) 375-3558,

Lisa Nelson, Mountains to Sound Greenway Trust, (206) 373-1598,

Partners and Funding Sources

Related information

Related agencies

Program offices are located at 201 S. Jackson St., Suite 600, Seattle, WA 98104. To contact staff, see the Noxious Weed Control Program Directory, send an email, or call 206-477-WEED (206-477-9333).