A method of identifying the occurrence of one or more organized athletic events including a plurality of participants is disclosed. The method includes receiving athletic activity data for the participants from a plurality of athletic activity monitoring devices carried by the participants. The received athletic activity data defines workouts performed by the participants. The method further includes defining a plurality of parameters for the athletic activity data, wherein the parameters define common athletic activity data for the participants of each of the organized athletic events. In addition, the method includes clustering the athletic activity data into one or more clusters of workouts based on the defined parameters for the athletic activity data. Furthermore, the method includes identifying the one or more organized athletic events based on the one or more clusters of workouts.