Results of the St. Pat's 10 Miler and 5K

Recently I ran the St. Pat's 10 Miler in Atlantic City, Nj. It was my first official running event ever and I enjoyed it lot.

Shortly after the race the official results have been posted on the Internet. The data did not only include the number and times of the participants but also gender and age. Looking at the finisher time distribution it shows that most runners finished at around 90 minutes:

How does age affect the finishing time?

The code to generate the images: