What is a running club
A running or active outdoor club is a not-for-profit group of people who meet regularly for fun runs, events, races, runs, etc and hold at least one public event per year such as a race. All active outdoor events such as running, track, bicycling, hiking, orienteering, swimming, rowing, paddling, snowshoe, in-line skating and walking events are welcome (and indoor triathlons). Elementary, high school, boys and girls track teams can also be included.
Races by running club: http://www.usracecalendar.com/all-upcoming-races-date-and-running-club