The Outdoors Club
Organization with chapters across the United States participates in hiking, camping, climbing, biking, kayaking, rafting, and skiing. Includes schedule, articles, pictures, discussion forum, and membership information.

Appalachian Mountain Club
Organizations participates in camping, hiking, paddling, skiing, and other snow sports and perates regional chapters from Maine to Virginia. Includes links to chapters, facilities information, membership information, conservation and educational programs, and newsletter. (eastern United States)

Appalachian Mountain Club, Delaware Valley Chapter
Volunteers lead events including: hiking, canoeing and kayaking, biking, skiing, climbing, social events, and conservation and trail maintenance. (Pennsylvania, New Jersey, and Delaware)

Appalachian Mountain Club, New York-North Jersey Chapter
Participates in backpacking, bicycling, camping, canoeing and kayaking, climbing, sailing, social events, and conservation efforts. Site includes schedule of upcoming events. Membership and contact information, plus trip reports, photos, and newsletter.(New York and New Jersey)

Mosaic Outdoor Clubs of America
A network of non-profit organizations dedicated to outdoor activities for Jewish adults, offering hiking, biking, camping, boating, rock climbing, backpacking, skiing, and diving. Site includes local chapter information, photos, organizational information, and an events listing.

The Adventurers Club
Organization is based in Chicago but has members elsewhere. Membership is open to men and women whose activities the club considers adventuresome. Site includes organizational information and a schedule of events.

Adrenaline Junkies Adventure Club
Operates in New England and southern California. Activities include swimming, kayaking, skiing, skydiving, climbing, orienteering, caving, hiking, and surfing. Site includes membership details, media links, and schedule. (Boston, Massachusetts and San Diego, California)

Leave No Trace
Encourages responsible, non-motorized outdoor activities with minimal impact on public recreational areas. The program provides education in outdoor skills and ethics.

Kansas Prairie Packers
An informal group for individuals and families in Topeka. Find calendar, newsletter, photos, contacts, and articles.

National Recreation and Park Association
Contains newsletter, events, awards, mission statement, training and education facilities, officers, and contacts. Located in Ashburn, Virginia.

Wild Side Adventure Sports
Young professionals in the New England area participate in skiing, rafting, biking, hiking, and social events. Includes schedule and pictures.