What surprised me in this 2019 Cleveland Marathon was the tremendous gaps in both the male and female wheelchair entrants. Also the nice warm weather isn't nice for runners who trained in cooler conditions and end up with a warm day which can sap ones strength and requires very good hydration practices.
Here's my Facebook link to my photo album: https://www.facebook.com/abelisle1/media_set?set=a.10156648811973285&type=3