California
Bonita Valley Trails, California Adventure Club, California Great Outdoors, Confused Outdoor Club, Los Angeles Area Adventure Club, Outdoors Unlimited, Redwood Outdoor Club
Colorado
Colorado Mountain Club, Colorado Mountain Club, Fort Collins Group, Colorado Mountain Club, Weld County Group, Pikes Peak Group, Colorado Mountain Club
Illinois
Endangered Spirit, Northwestern University Outing Club, Outdoor Adventure Club, Conant High School, Southern Illinois University at Carbondale Outdoor, The Adventure Travelers Society, University of Chicago Outdoor Adventure Club
Maryland
Adventurequest Unlimited, Chesapeake Hiking and Outdoor Society, Izaak Walton League of America, Frederick Chapter, Johns Hopkins Outdoors Club, Maryland Outdoor Club, Mosaic Outdoor Mountain Club of Maryland, Terrapin Trail Club
Massachusetts
Amherst College Outing Club, Appalachian Mountain Club, Berkshire Chapter, Appalachian Mountain Club, Boston Chapter, Appalachian Mountain Club, Southeastern Massachuse, MIT Outing Club, Mount Holyoke Outing Club, University of Massachusetts Dartmouth Outing Club, University of Massachusetts Outing Club, Westfield State College Outing Club
Michigan
Adventure Team, Detroit Sportsmen's Congress, Great Lakes Adventure Club, Lapeer County Sportsmen's Club, Michigan Association of Recreation Vehicles and Ca, Michigan Outdoor Women's Club, Michigan State University Outing Club, Multi-Lakes Conservation Association
New Hampshire
Appalachian Mountain Club, New Hampshire Chapter, Dartmouth Outing Club, The New Hampshire Outing Club
New Jersey
Outdoor Club of South Jersey, Princeton University Outdoor Action Program, The Friends of Island Beach State Park, Union County Hiking Club, Xtreme Habitat
New York
Adirondack Mountain Club, Adirondack Mountain Club, Albany Chapter, Adirondack Mountain Club, Finger Lakes Chapter, Adirondack Mountain Club, Genesee Valley Chapter, Adirondack Mountain Club, Laurentian Chapter, Adirondack Mountain Club, Mid-Hudson Chapter, Appalachian Mountain Club, Mohawk Hudson Chapter, Chinese Mountain Club, Clarkson University Outing Club (CUOC), Cornell Outing Club
North Carolina
Duke Outing Club, North Carolina State University Outing Club, Triangle Adventure Center
Oregon
Chemeketans, Friends of Fishermen's Bend, Reed Outing Club, University of Oregon Outdoor Program, UNREAL Adventures
Pennsylvania
Allentown Hiking Club, Butler Outdoor Club, Carnegie Mellon University Exploration Club, Erie Outing Club, Penn State Outing Club, Pennsylvania Women Outdoors, Ridge & Valley Outings Club, Souderton - Harleysville Game, Fish & Forestry
Rhode Island
Appalachian Mountain Club, Narragansett Chapter, Saugatucket River Heritage Corridor Coalition, University of Rhode Island Outing Club
Tennessee
Tennessee Eastman Hiking and Canoeing Club, Tennessee Trails Association, University of Tennessee at Martin Outdoor Recreati
Texas
Central Texas Trail Tamers, Friends of Anahuac National Wildlife Refuge, Hill Country Outdoors, Rice Outdoors Club, Texas Outdoors Woman Network, Austin Chapter, Texins Outdoor Club
Virginia
Charlottesville Area Club, Outdoor Club of Virginia Tech, Tidewater Appalachian Trail Club, Virginia Adventure Club
Washington
Epic Adventures, Mount Baker Club, Puget Sound Region Outdoor Christian Singles, Seattle Parks Foundation, Spokane Mountaineers, The Cascadians, Washington Waterfowl Association
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)
Appalachian Mountain Club
Members from Maine to Virginia participate in hiking, paddling, skiing, and other outdoor activities. Includes links to lodging destinations, local chapters, membership, conservation programs, and outdoor activities.
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 C
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)
Kansas Prairie Packers
An informal group for individuals and families in Topeka. Find calendar, newsletter, photos, contacts, and articles.
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.
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.
National Recreation and Park Association
Contains newsletter, events, awards, mission statement, training and education facilities, officers, and contacts. Located in Ashburn, Virginia.
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.
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.
Wild Side Adventure Sports
Young professionals in the New England area participate in skiing, rafting, biking, hiking, and social events. Includes schedule and pictures.