Of the major marathons, the peak event was the Boston Marathon in April, which brought 29,000 visitors to the site. Interestingly, the US Marathon Olympic Trials, a major event that nevertheless had far less publicity than Boston, was the third most popular on flotrack.org. New York was fourth. Chicago? it's not the spike in September; looks like only 15,000 visited the site to follow the Chicago marathon.
Monthly Web and Mobile Metrics: December 20, 2011 to January 20, 2012
Monthly Mobile-only Metrics: December 20, 2011 to January 20, 2012
11-Month Web and Mobile Metrics: December 20, 2011 to January 20, 2012 (embedded chart)