Arboretum Foundation
- http://www.arboretumfoundation.org/
- Provides membership and volunteer programs, raises funds to support the Washington Park Arboretum collections, maintenance and education programs, and produces ongoing and seasonal plants sales. Events calendar, volunteer opportunities and news.
Dunn Gardens
- http://www.dunngardens.org/
- Garden designed by the Olmsted brothers, offering woodland plantings and panoramic views. History, and illustrated pages for many featured plants and trees. Open for guided tours only.
Duwamish River Cleanup Coalition
- http://www.duwamishcleanup.org/
- An alliance of community, environmental and small business groups affected by ongoing pollution and cleanup plans for the Duwamish River, with the mission to ensure a cleanup that is accepted by and benefits the community and is protective of fish, wildlife and human health.
Friends Of Magnuson Park
- http://www.saveourpark.org/
- Dedicated to protecting the natural habitat and beauty of the park and ensuring future development for recreational or other purposes is consistent with these goals.
Friends of Discovery Park
- http://www.discoveryparkfriends.org/
- Volunteer organization committed to defending the integrity of Discovery Park, an urban forest located in the Magnolia neighborhood of Seattle. Includes a newsletter, current campaigns, and a newsletter.
Friends of the Cedar River Watershed
- http://www.cedarriver.org/
- Describes the watershed including its plants and animals, history, recreational opportunities, and an educational center. Also offers contacts, info on how to get involved, and a kids page.
Long Live the Kings
- http://www.lltk.org/
- Organization restoring wild salmon in the Pacific Northwest. Includes an overview of hatchery reform, events, merchandise, background on salmon biology, and links.
Northwest Interpretive Association
- http://www.nwpubliclands.org/
- They help the National Park Service, the US Forest Service and other northwest public land agencies provide books, maps, trail guides, and other high quality educational materials to the visiting public.
Pacific Science Center
- http://www.pacsci.org/
- An independent, not-for-profit educational foundation dedicated to increasing the public's understanding and appreciation of science, mathematics, and technology through interactive exhibits and programs.
Seattle Robotics Society
- http://www.seattlerobotics.org/
- Founded in 1982, the SRS is one of the oldest and largest robotics groups in the world. Membership is open to everyone. The group holds monthly meetings and several competitions. Site includes the Encoder online newsletter.
Seattle Urban Nature Project
- http://www.seattleurbannature.org
- Surveys urban wildlife habitat and maps open space and parks in Seattle to foster understanding, stewardship, and conservation of public lands. Includes an overview of the mapping process, tips to identifying habitats, and volunteer opportunities.
Washington Park Arboretum
- http://depts.washington.edu/wpa/
- Urban green space on the shores of Lake Washington includes collections of Acers and New Zealand natives, and a functional winter garden landscape. Information about visiting and collections, news and events, and seasonal highlights.