- Tread Lightly! Inc.
 - Organisation to promote respectful outdoor recreation and outline responsibilities for use of backcountry roads and trails. - Association for Experiential Education
- Focusing on all aspects of experiential education with historical roots in adventure-based and outdoor education.
- America Outdoors Association
- National, nonprofit association of outfitters providing recreation services to the public.
- Outdoors Club, The
- Offers a forum and tools for young adults to plan trips and activities.
- Great Outdoors, Inc.
- A nonprofit, all-volunteer, gay and lesbian recreational group based in Southern California.
- Wilderness Volunteers
- Nonprofit organisation created to match volunteers with work projects for public land agencies like the Forest Service, Park Service, BLM, and Fish and Wildlife. Find out about volunteer opportunities, upcoming trips, and how to help.
- Oregon Guides & Packers Association
- Official site, representing the outdoor guide industry.
- Mosaic@
- Alaska Fish and Wildlife Federation and Outdoor Council
- Federation of Alaskan organisations and individuals protecting Alaska's outdoor heritage and conserving the resource base on which it depends.
- Texins Outdoor Club
- Encompasses many of the outdoor adventure sport and promotes goodwill and conservation of all our natural resources.
- Healing Waters
- Nonprofit organisation dedicated to providing outdoor adventures to people with AIDS.
- Cabela's Sportsman's Quest
- Sponsor of angling, archery, shooting, and sporting dog events.
- San Francisco Outdoor Adventurers' Club
 SAFRA@
- Raleigh International Singapore, Operation Raleigh Singapore
- Aims to develop young people through challenging community and environmental work on projects and expeditions.
- University of Chicago Outdoor Adventure Club
- Events calendar, photos, gear list, links, and more.
- Blazing Outdoor Adventurers & Co
- Offers local and overseas adventures such as trekking, biking, rock climbing, safaris, as well as outdoor gear equipment.
- Bay Circuit Alliance
- Organisation working to create a permanent recreational trail linking the parks and open spaces surrounding metropolitan Boston.
- American Adventure Service Corps (TAASC)
- Co-ed, year-round, nonprofit youth organisation that utilizes outdoor adventure education and service to others.
- Woodcraft Folk, The.@
- Club Endeavour
- Offers corporate and individual memberships. With local and overseas facilities including Phuket, Canada, and Indonesia.
- Singapore Adventure Leader Training
- Promotes competency and safety in adventure leadership.
- CSU Monterey Bay Outdoor Recreation
- Offering outdoor activities to both the public and the university.
- Pike County Federation of Sportsmen's Clubs
- Organisation concerned about conservation and outdoor life. Also includes information on their Youth Conservation School.
- Yale Outdoors
- Outing organisation offering hiking and backpacking trips and other outdoor activities at Yale University.
- York University Outing Club
- Located in the outskirts of Toronto, this club offers a variety of outdoor and indoor events to the surrounding community.
- Williams Outing Club@
- Craziest Outdoor Club
- Now soliciting members.
- Adventuring/IGLOO
- Resources related to the International Gay and Lesbian Outdoor Organisation.
- University of Massachusetts Amherst - Outing Club
- Duke Outing Club
- Duke University student club for outdoor and wilderness activities in North Carolina.
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