Flat or hilly course?

I've heard various things about the Big D race's course. Is it flat or hilly?

It would really help my training prep if someone could tell me!

It has long stretches that are flat with some hills and most difficulty coming between mile 12 and 20.

It's a good idea to visit the Big D website map page as they have extensive details about the course there.

This will be the most beautiful marathon course you will ever run in a large city.