This loop-based endurance event welcomes runners of all levels—whether you're tackling your first 10K or you're a seasoned ultra runner—to complete as many 3.1-mile trail loops as you'd like in Foristell, MO. A new loop starts every hour on the hour, and you're free to keep going or stop whenever you want with no penalties or DNF marks against you. Your score is simply the combined times of all the loops you finish, making it a straightforward, judgment-free way to challenge yourself at your own pace.