BKB Limited Event Management

Local and international races from a family fun run to marathons with online registration and past results.
http://www.bkbltd.com/

W2 Promotions Professional Road Race Management

Aids non-profit organizations raise awareness and funds by organizing 5K and 10K runs and walks, marathons, triathlons, and family fun runs.
http://www.w2promotions.com/

Nude Runners Calendar

Provides a world-wide listing of nude running events. Also contains some links to the event sites.
http://wanr.earthbiz.net/Calendar.html

Island Runner

Provides an international listing of runs that take place on islands. Races are organized by country. Also provides a message board.
http://www.islandrunner.org