Pacing is pretty individual, general guidance is slower so that you aren’t running yourself too hard but depending on the athlete “slow” is super individual.
Theres a pretty great documentary on the backyard ultra that the people who host the Barkley marathons put on, I think it does a great job of capturing the psychology of the last few standing. TLDR starting the next lap is the hardest part. https://youtu.be/ZRXKZSqvtrw
No wonder that trail is closed, I had no idea and was salty when my running route got diverted