Whoa! Talk about crazy flatness! I have ran my fair share of races on park paths or greenways, but they always seem to find a few hills on those paths. There was only one tiny hill each way on the loop which was a wooden bridge connecting the two parks over the river.
Since you have to slow your body down a bit in summer running when battling the heat and humidity, my goal was to run even splits and work on controlling my breathing better. It's these tough summer runs that can make you a stronger runner for fall, so I like to take advantage of cruddy conditions to work on different aspects of my race.
My pace was fairly even with my third mile slowing down just slightly, but overall it was fairly consistent. My breathing was also better than it has been - I wasn't doing all the huffing, puffing and gasping. Instead, my breaths were controlled and efficient.