Want an adaptable endurance test in Roland, AR? This hourly loop event is perfect for runners of any level—from first-time 10K participants to experienced ultramarathoners, along with CrossFit, Hyrox, and tactical athletes—where you'll run a 3.1-mile trail loop with fresh starts beginning every hour on the hour. The beauty of it is that you decide after each lap whether to continue or stop, with no consequences either way.