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Project description

Mid Fork Snoqualmie Valley - contact Mark Boyer for permission to use photo

Plant 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 Upper Snoqualmie 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 are surveying trails from Mt. Si near North Bend to Dutch Miller Gap in the heart of the Alpine Lakes Wilderness.

2018 news and events

We will be co-hosting two training classes this year with the PNW-IPC Citizen Science EDRR program. We welcome new and returning volunteers to join us for either class. Also stay tuned for group hikes and other ways to learn and participate.

  • Seattle Training, May 7, 6:00-8:30 pm, Mountaineers, 7700 Sand Point Way NE, Seattle WA 98115
  • North Bend Training, June 3, 12:30-4:30 pm, Snoqualmie District Ranger Station, Conference Hall, 902 SE North Bend Way, North Bend, WA 98045

Register online on our Class Schedule page

Download the 2018 training flyer

If you are interested in heading out for some weed watching sooner, that can definitely happen. Contact Sasha Shaw for more information and she can get you on the trail looking for weeds in no time!

If you are interested in volunteering on trails outside of King County, check out the PNW‐IPC Citizen Science EDRR program for lots of options throughout western Washington and even into Oregon.

Project resources
2009 Map of Invasive Plant and Noxious Weed Surveys in the South and Middle Fork Snoqualmie River Basins - click for larger image

Note: These resources are for reference only. Please contact Sasha Shaw for the latest information and forms.


Weed Identification


Training video (2013)



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,

    Jonathane Schmitt, Invasive Plant Coordinator, Mt. Baker Snoqualmie National Forest,

    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,


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.

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).