Economic Impact 2012 $18.25 Million Generated In 2012, an economic impact study was concluded and reflects that the 2012 Cleveland Marathon generated $18.25 million toward the City of Cleveland's economy during race weekend, May 18-20. That figure represents a growth of 170 percent over the 2004 findings that resulted in a figure of $6.8 million. The study of the May race was conducted by Forward Analytics, a Pittsburgh-based full-service marketing research and strategic planning firm that boasts numerous major clients located throughout the country. You may click here to download the full 2012 Economic Impact Study. Top