In a Marathon, it’s common for runners to get classify into different starting zone. This classification depends on individual timing and the purpose is not to obstruct those who are going faster.
For myself, I try to stay within those finishing approximate 6 hours so that I can enjoy the run and start overtaking other runners at the last part of the race. This also tends to help me stay motivated 😜
Finally, this is also the first time that I came across this term called Corrral, which what I usually term that as zone or pan. You can find out more from the article below.