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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.

Weed watchers

What is a Weed Watcher?

Trail Weed Watchers at work

A weed watcher is a volunteer who “adopts” an area to watch for weeds that could harm that area. A weed watcher surveys the adopted area for invasive plants and noxious weeds during the growing season and reports back on what they find. Sometimes they pull the weeds too if that’s a good way to control that type of weed, but they make sure to let us know so we can keep track of what’s been done. Adoption can last for one growing season or can continue for as many years as you want. Weed watchers help us find new invaders before they get established and help us protect our natural resources and wilderness areas.

Trail weed watchers

Join the Upper Snoqualmie/Alpine Lakes Wilderness Weed Watchers to watch for invaders in these popular recreational and wilderness areas.  Hikers are needed to survey the trails of the Middle Fork Snoqualmie Valley and the Snoqualmie Gateway area of the South Fork Snoqualmie.

Join the Pacific Northwest Invasive Plant Council's Citizen Science EDRR Monitoring Program to watch for invaders in wilderness and recreation areas throughout the Pacific Northwest. Training classes and monitoring opportunities are available in many locations in Washington and Oregon.

Lake weed watchers Lake weed watchers learning about water weeds

Join the Lake Weed Watcher Program and help us find aquatic weeds while there's still a chance to stop them. 

What happens with the data?

The information from the weed watchers goes to local agencies and community organizations who are working to control invasive plants and noxious weeds in our area. Priority species vary by project and geographic area, but the fundamental goal is the same - protect our natural treasures and recreation areas from the harmful impacts of invasive plants.

Sign up and get started

To sign up and get started, go to our Weed Watcher Online Reporting Site. Sign up to adopt a trail or a lake, enter weed watcher survey data and weed locations, or search our weed watcher database to see what's been found on trails and lakes in King County and the Alpine Lakes Wilderness.

Contact us:

Sasha Shaw
King County Noxious Weed Control Program
201 S. Jackson St., Suite 600, Seattle WA 98104
206-477-4824
sasha.shaw@kingcounty.gov

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).