You have one hour to run this 4.5 mile trail loop. How many times do you think you could do that? This race is a last-person-standing format and will keep going as long as there are at least two people who can complete the loop within the hour. If you finish faster than that hour, you get some time to rest, eat, recover before you head back out on the hour. If it takes you longer than an hour, your race is done. You don’t have to be fast, you just have to be last.