United States

Columbia Triathlon Association - A non-profit association based in Columbia, Maryland that supports triathlon, duathlon and multisport athletes through race sponsorship and results, social events, online forum.
http://www.tricolumbia.org/

Orange County Triathlon Club - A member-driven organization providing a network of information, training and racing activities, friendship and fun to men and women of all ages and athletic abilities.
http://members.tripod.com/octriclub/index.htm

Tri-KC Triathlon Club - Provides news, information, calendar, events, workouts, roster, training tips, and links.
http://www.eteamz.com/TriKC/

Space Coast Triathletes - Brevard County, Florida-based club that sponsors two local sprint distant triathlons, The Battle of the Bridges, and Pineapple Triathlon. Features news, schedule and results, training information and contact details.
http://www.sctriathletes.com/

USA Triathlon - Southeast Region - Home of the Southeast Regional Federation of USA Triathlon.
http://www.usat-se.org/

Team Ulua - A run, bike and swim club based in Honolulu, Hawaii. Fitness center, coaching and training for triathlons, marathons, biking and mountain biking events.
http://www.teamulua.com/

Santa Cruz Triathlon Association - The SCTA is committed to promoting the sport of triathlon through a diverse level of multi-sport activities, in a fun and supportive atmosphere.
http://www.sctriathlon.com/

Wright Triathlon Club of Dayton - A multi-sport training, racing, and social club for athletes of all ability levels in southeast Ohio.
http://www.wrighttriclub.org/

USA Triathlon - New England Region - All the information needed to train, race and follow the sport of triathlon in New England. Race schedule, club listing, news, interviews, and results. Links to USAT resources.
http://usatnortheast.com/

Raleigh Area TriathleteS (RATS) - Club brings together multisport and endurance athletes in the Raleigh area for training and camaraderie. Features training partner search, articles, news, discussion board.
http://www.trirats.org/

Chicago Triathlon and Multisport Club - Provides triathletes an outlet to grow their athletic abilities and develop friendships. Includes calendars for group workouts, clinics, racing and social events.
http://www.chicagotriclub.com/

Boulder Triathlon Club - Boulder, Colorado's triathlon and multi-sport club. Features news, events and information promoting the area's multi-sports athletes.
http://teambtc.org/

Race St. Louis - An endurance racing resource for the Saint Louis metro area. Also, home of the Race St. Louis triathlon and adventure racing team. Database driven event and group training calendar, links, target heart rate calculator and the St. Louis Spinning class calendar.
http://www.racestlouis.com/

Ann Arbor Triathlon Club - Dedicated to triathlon and to provide guidance and training activities for established and aspiring triathletes. Provides club information and results, race calendar, photos, and links.
http://www.aatriclub.org/

USA Triathlon - The official governing body of triathlon in the US. Rankings, schedule, merchandise, travel information. Not just for the pros.
http://www.usatriathlon.org/

Las Vegas Triathlon Club - A club to promote the sport of triathlon and multi-sport endurance events in Southern Nevada and build a rock-solid, community club for all levels of fitness. Includes forum, training tools, results, and an officer listing.
http://www.lvtriclub.com

Boise Aeros Multisport Club - A multisport club in the Boise, Idaho area. Training, results, links, and a message board.
http://www.boiseaeros.com/

Team Dork Rocket - A group of triathletes from around the United States. Events, articles, training programs, workouts, and photographs.
http://www.dorkrocket.com/

Charleston Triathlon Club - Triathlon club based in Charleston, South Carolina, USA since 1986. Annual schedule of triathlons and biathlons.
http://www.charlestontriathlonclub.com/

San Francisco Triathlon Club - A multi-sport club that focuses on swimming, cycling and running. In addition to weekly group swims, rides and runs, classes, coached workouts, safety programs, and clinics are held.
http://www.sftriclub.org/

Mid Maryland Triathlon Club - A member-driven organization for triathletes of all ages and abilities who live in central Maryland. Members live or work in Howard, Montgomery, and Anne Arundel Counties, as well as Baltimore and Washington, D.C. Workout schedule, events, and contact details provided.
http://www.midmdtriclub.org/

T3 Triathlon - Information about the member's of T3 triathlon team in Philadelphia, PA. Biographies, races, photographs, results, and links.
http://www.t3triathlon.net/

Los Angeles Triathlon Club - Provides information, support services, training and racing activities for all ages and abilities. Includes news, calendar of events, photos, membership information, and related resources.
http://www.latriclub.com

Inland Inferno Triathlon Club - Supports multisport athletes of Los Angeles Country and Inland Empire areas of Southern California through athletic and social events, race results, newsletter, training, photos.
http://inlandinferno.com/

USA Triathlon - Rocky Mountain Region - Promotes, supports and coordinates athletic competition in the sport of triathlon, duathlon, and multi-sport in Colorado, New Mexico, Texas (El Paso County), Utah, and Wyoming. Links, calendar and results provided.
http://www.usat-rockymountain.org/

Tribe Triathlon Club - Offering Silicon Valley, San Jose, Bay Area and Santa Clara athletes, including kids, a triathlon for triathletes.
http://www.tribetriathlon.com/

Columbia Multisport Club - Columbia and Mid-Missouri area club that promotes a strong group training format, supports local races and provides support for the local community.
http://www.columbiamultisport.com/

Team Sheeper - Full-service multiSport and triathlon organization providing coaching and other related services to triathletes and swimmers of all levels.
http://www.teamsheeper.com/

Triathlon Club of Asheville - Asheville, North Carolina club for triathletes of all levels. Group training, race tactics, schedule of local races, and links to other triathlon sites.
http://www.ashevilletri.com/

St. Louis Triathlon Club - Support St. Louis Metro Area triathles with events calendar, training and competitions, message board and members only area.
http://www.stlouistriclub.com/

University of Wisconsin Triathlon Team - An all-inclusive team for student athletes to train and learn from each other. News, workout schedule, and links.
http://www.uwtriathlon.com/

Clemson University Triathlon Club - Offers race updates, race photos, training tips, training schedule, a nutritional guide, and links.
http://people.clemson.edu/~triath/

Golden Gate Triathlon Club - Serves multisport athletes of all ages and abilities in and around San Francisco. Offers information on workouts, training programs, and racing events
http://www.ggtc.org/

Triathlantic Association - A large and fast growing East Coast multi-sport racing organization. Features race calendar, results, history and contacts.
http://www.triath.com/