Washington Trails Association
- Volunteer-driven, non-profit organization works to preserve and promote hiking opportunities in this state. Provides events calendar, trail guides, trip reports, and guide to flora and fauna of the Pacific Northwest.
- http://www.wta.org/

Hiyu Coulee Hiking Club
- Seattle University organization offers day hikes and weekend trips within a 100 mile radius of Seattle. Includes events calendar and photo gallery.
- http://students.seattleu.edu/clubs/hiking/