The 2015 Chicago Marathon continued to live up to its reputation as one of the most popular races in the world along several dimensions: a flat and fast course, more than a million cheering spectators, and thousands of top-notch volunteers. The entire city seemed to embrace the event again this year.

Here are some fast facts about the 2015 Marathon, which you may have already seen in media reports:

  • 45,000 entrants are selected to run through a lottery, which had more than 70,000 applicants.
  • A total of 37,182 runners finished the race (20,144 men, 17,038 women)
  • Dickson Chumba won a slow men’s race in 2:09:25, while Florence Kiplagat won the women’s race in 2:23:33.

But let’s look deeper. The following 13 charts, compiled by Raymond Britt, takes a closer look at the results and answers a number of question. What was the average finish time overall? How are the finishers divided up by age group? How did average finish times compare to last year? How much slower is the second half of the race compared to the first?

Enjoy the trip through the analysis. For more of Britt’s in-depth histrocial analysis of Chicago, visit


Average Finish Times By Division
2015 Finishers by Age Group
2014 vs. 2015 Average Finish Times by Age Group
Average, First 13.1 and Last 13.1 Miles
First 13.1 and Second 13.1 Splits by Division
Splits and Finish Times, 2011-2015
Finishers, 2011-2015
Winning Times, 2011-2015
Top 5 Finisher Times, 2011-2015
2014 vs. 2015 Finishers by Female Age Group
2014 vs. 2015 Finishers by Male Age Group
Chicago Winner 5K Splits
Chicago 5K Splits