Oriental Fitness Center & Enshin Karate
- View class schedule, events calendar, and contact information.
- http://www.virginiakarate.com

Northern Virginia Regional Park Authority
- Administers golf courses, trails, swimming pools, ball fields, and other recreational facilities. Facilities and parks guide, event announcements, fees and regulations, and NVRPA news.
- http://www.nvrpa.org/

Yong In Martial Arts Academy
- Learn about martial arts and view the class schedule.
- http://www.yonginacademy.com/

Northern Virginia Volksmarchers
- Regional walking club. Includes meetings, calendar of events, and contact information.
- http://www.pollow.com/nvvc/

GORP: Potomac Basin
- Guide to the Potomac River Basin hiking, biking, camping, climbing and other outdoor activities.
- http://gorp.away.com/gorp/location/md/ru_poto.htm

Northern Virginia Special Olympics
- Year-round program of sports training and athletic competition for children and adults with mental retardation. NOVASOVA is Area 26, accredited by Special Olympics, Virginia.
- http://www.novasova.org

SkateQuest Ice Rinks
- Located in Reston, and Dale City. Public sessions, hockey, adult leagues, figure skating, ice dancing, synchronized teams, ice theatre, group lessons, private instruction, Pro Shop, cafe, and party rooms. Homes of the Reston Raiders and Prince William Pan
- http://www.skatequest.com/

Tiger Den, Inc.
- Martial Arts and Family Fitness Centers located in Potomac Falls, Fairfax Station, and Woodbridge.
- http://www.gotigerden.com/

The Potomac Aquaria Forum
- Mailing list dedicated to those who like to collect, keep, and learn more about North America's native fish -- particularly those found within the Potomac River Basin.
- http://groups.yahoo.com/group/PotomacAquaria/