On one of the course walks last year Dickie Waygood and Kyle Carter were discussing how the terrain here doesn’t have huge hills but is absolutely undulating and a lot of people underestimate that/aren’t prepared for it. Most think it’s fairly flat but once you ride it you realize that there are actually a ton of terrain changes and that takes it out of horse and rider.
I’m from PA and every casual hack out covers vastly more changes in elevation than there are in KY, but for people who aren’t training in a super hilly area like that, I can see why the horse park could present some difficulty.