“Run Free: The True Story of Caballo Blanco” is a documentary about Micah True, aka “The White Horse,” an “ultramarathon” runner who went to live among the Tarahumara Indians of Mexico and then brought aspects of traditional Mexican “running culture” to the modern longdistance sport. The screening is sponsored by the Memphis Runners Track Club. 7 p.m., Paradiso. Tickets: $12 in advance or $15 at the door. Visit imathlete.com/events/runfree.