Friends
Alpine Lakes Protection Society Alpine Lakes Protection Society (ALPS) () -
Conservation Northwest Conservation Northwest (206) 675-9747
Eastside Audubon Eastside Audubon Society (425) 576-8805
Environmental Defense Fund (EDF) Environmental Defense Fund (EDF) (800) 684-3322
Forterra Forterra (206) 292-5907
Friends of Lake Sammamish State Park Friends of Lake Sammamish State Park () -
Friends of the Cedar River Watershed Friends of the Cedar River Watershed (206) 297-8141
Friends of the Issaquah Salmon Hatchery Friends of the Issaquah Salmon Hatchery (425) 392-1118

Goldmyer Hot Springs (206) 789-5631
Issaquah Environment Council (IEC) () -
Leave No Trace (LNT) (800) 332-4100
Mountaineers Mountaineers (206) 521-6000
Mountains to Sound Greenway (MTSG) Mountains to Sound Greenway (MTSG) (206) 382-5565
National Parks Conservation Association (NPCA) - Seattle (800) 628-7275
National Wildlife Federation (NWF) National Wildlife Federation (NWF) (800) 822-9919
Natural Resources Defense Council (NRDC) Natural Resources Defense Council (NRDC) (212) 727-2700
Nature Conservancy Nature Conservancy (800) 628-6860
Newcastle Trails Newcastle Trails (425) 829-2196
North Cascades Conservation Council (NCCC) North Cascades Conservation Council (NCCC) (360) 296-5159
Northwest Hikers
Northwest Hikers
() -
Northwest Waterfalls Survey Northwest Waterfalls Survey (NWS) - King County () -
Pacific Crest Trail (PCT) Association Pacific Crest Trail (PCT) Association (916) 285-1846
 Parks and Recreation Coalition Parks and Recreation Coalition (PARC) () -
Rails-to-Trails Conservancy Rails-to-Trails Conservancy (202) 331-9696
Renton Trails Renton Trails (425) 243-2035
Save Lake Sammamish (SLS)
() -
Save Squak Save Squak () -
Sierra Club - Cascade Chapter Sierra Club - Cascade Chapter (206) 378-0114
Snoqualmie Valley Trails Club (SVTC) Snoqualmie Valley Trails Club (SVTC) () -
Student Conservation Association (SCA) Student Conservation Association (SCA) (603) 543-1700
Trust for Public Land (TPL) Trust for Public Land (TPL) (415) 495-4014
Washington Butterfly Association Washington Butterfly Association (206) 364-4935
  Washington Environmental Council (WEC)
(206) 631-2600
WA Forest Law Center Washington Forest Law Center (WFLC)
(206) 223-4088
Washington Native Plant Society (WNPS) Washington Native Plant Society (WNPS) (206) 527-3210
Washington Trails Association (WTA) Washington Trails Association (WTA) (206) 625-1367
Washington Wildlife and Recreation Coalition (WWRC) Washington Wildlife and Recreation Coalition (WWRC) (206) 748-0082
Wilderness Society Wilderness Society (800) 843-9453
World Wildlife Fund (WWF) World Wildlife Fund (WWF) (800) 960-0993