Callie and I ran a Turkey Trot today. it was a big event but they did not have a timing system. They let groups go in 20 minute waves. My goal was to pace Callie to something below 22:00. We didn't quite do it but close. The course was pancake flat except at the turn around which had a bout a 30-40 ft rise for about a tenth of a mile. We ran along the beach in Hunington Beach, California.
This was a pretty easy effort for me as my HR only averaged 154 which is below avg marathon pace. The last 5K I ran was back in 2012. I should run some more and see if I can get to the suh - 18.