Watch The Long Haul 100 (2021) : Full Movie Online Free What does it mean to push your body to its limits? The Long Haul 100 follows Katie Rozar on her training and race journey to run a 100 mile ultra-marathon for the first time. Katie approaches running from a scientific angle, turning her training into an equation to test her mental and physical abilities. As the race begins to weigh on her, we see there is no perfect calculation but the drive to finish and a strong support system.