The Massachusetts Bay League
- Group of sailing teams and clubs from schools in the Greater Boston area. Events, standings, rules, and coaching help links.
- http://www.massbayleague.org

Charles River Swimming Club
- Highlights group activities and safety of swinning in river.
- http://www.charlesriverswimmingclub.org/

Community Running Association of Boston
- A professionally coached, non-profit club for middle to back of the pack runners.
- http://www.communityrunning.org

MassBike/MetroBoston
- Focusing on area vehicular cycling issues. Includes tips, cycling advocacy goals, links to cycling resources, and membership information.
- http://www.massbike.org/mbmb/

Mosaic Outdoor Mountain Club of Massachusetts
- Club of Jewish outdoors enthusiasts. Contains membership information, an event schedule, and pictures of past events.
- http://www.mosaicoutdoor.org/boston

Boston Area Youth Soccer
- League information, including schedule, photos, directions to fields, and registration information.
- http://www.bays.org/

Boston Pool Halls
- Directory of area pool halls and tournaments.
- http://www.bostonpoolhalls.com/

Team With A Vision
- Information about annual walk/run around the Charles, for the benefit of the visually impaired.
- http://www.twav.org/

FC Greater Boston
- Soccer club for ages 11 to 20. Includes rosters, news, and tryout information.
- http://www.fcgreaterboston.com/

Bay State Skating School, Inc.
- Providing recreational ice skating lessons at fifteen Metropolitan District Commission rinks. Includes a class schedule, registration, policies, directions, and pictures.
- http://www.iceskatingclasses.com/

Minuteman Bikeway
- 11-mile bike path running through Bedford, Lexington, Arlington, and Cambridge. Includes a description, history, news, and directions.
- http://minutemanbikeway.org/

Middlesex Magic AAU Basketball
- Spring basketball teams for boys and girls from fifth grade through high school. Includes schedules and registration information.
- http://middlesexmagic.com/

Friends of the Community Path
- Provides information on group interested in extending Minuteman Bikeway/Linear Park, to Lechmere and then to downtown Boston; meeting information, event photos, and donation form.
- http://www.pathfriends.org/

Head Of The Charles Regatta
- Annual event information; includes entry form, rules, and guides for competitors with schedule, history, and tourism information for spectators.
- http://www.hocr.org/

Boston Ultimate Disc Alliance
- Non-profit organization of Ultimate teams. Includes league information, event calendar, and a mailing list.
- http://www.buda.org/

Walk Boston
- Promotes walking for transportation and recreation. Contains information about advocacy projects, a downloadable newsletter (PDF format), membership information, and walking links.
- http://www.walkboston.org/

Metropolitan Boston Hockey League
- Independent youth hockey league. Includes lists of coaches and officials, event calendar, standings, statistics, and a hall of fame.
- http://www.mbhl.com/

Brookline Bird Club
- Club which organizes birding trips, pelagic trips and lectures in various area locations. Contains trip schedules, photo albums and birding links.
- http://www.massbird.org/bbc/

Boston Grotto
- Local chapter of the National Speleological Society, for cave explorers. Features local cave information, a trip schedule, a photo gallery, a downloadable newsletter, and cave-related links.
- http://www.bostongrotto.org/

Patriot Trail Girl Scouts Council
- Serving young women in 64 area communities. Includes news, volunteer information, program listings, and links to troop sites.
- http://www.ptgirlscouts.org/

Boston Pride Hockey
- Information on competitive ice hockey teams composed of gay, lesbian, and straight members. Includes schedules, team statistics, and details about the Gay Games.
- http://www.bostonpridehockey.org/

Fish Boston
- Fishing charters in Boston Harbor and surrounding waters. Contains rates, fishing reports, and articles.
- http://www.fishboston.com/

Good Times Charters
- Inshore and offshore sportfishing charters. Includes rate information, articles, a photo gallery, and a reservation form.
- http://www.bostoncharters.com/

Reel Dream Charters
- Guided fly and light tackle fishing for stripers and blues in Boston Harbor. Contains fishing reports, description of services, customer testimonials, and rates.
- http://www.reeldreamcharters.com/

Dorothy Bruno Hills Indoor Tennis League
- Organization of women's tennis teams. Contains schedules, standings, links to participating clubs, and information about the league.
- http://www.dbhitl.org/