Howard County Bird Club
- Field trips, events, a checklist, county birders' lists, and photo gallery. Also includes checklists for the area's insects and wildflowers.
- http://www.howardbirds.org/

Howard County Striders
- Promoting fitness through running in the Columbia area. Includes results of area races, schedule of weekly runs, contacts, membership information, and club news.
- http://www.striders.net/

Howard County Recreation and Parks Sports and Adventure Services Division
- Features details and calendar of events for adult and youth sports leagues and recreational activities, including directions to league sites, contact details and registration.
- http://www.hcrpsports.com/

Special Olympics Howard County
- Provides a year-round training and competitive sports program for children and adults with mental retardation and/or closely related developmental disabilities. Calendar of events, sports programs, newsletters, and fundraising are highlighted.
- http://www.somdhc.org/