The popularity of horse racing in Chicago has yet to be rivaled in any other metropolitan area. Since the 1800s, the Windy City's enthusiasm for both harness and Thoroughbred racing led to 10 major racetracks being built in the Chicago area. Four of those raceways--Balmoral, Maywood, Hawthorne, and Arlington--are still racing and thriving today. From Washington Park, Lincoln Fields, and Worth Raceway on the city's South Side, to the Near West Side...