If you're looking for a PR course for a full marathon, Chicago has to be among one of the best! Course is a loop that goes throughout all corners of the city, from the North side to the South side. It was unbelievable to see how many people actually run (40K+ runners) and even a lot more people watching the race.

I had my best full marathon result here (3:04) and qualified for the Boston race in 2013! Great race if you can get in - must do!