November ultramarathons in Missouri, United States

50K through 10,000+ acres of Ozark terrain, with rocky paths, rolling hills, muddy stretches and stream crossings across Missouri and Arkansas

Scenic 4-mile loop around a golf course, hourly restarts, last-person-standing format with a 30-hour maximum

Repeated 10K loops on the scenic Opossum Hollow Trail: winding single-track, rolling hills, roots, rocks, creek crossings, and 550 ft gain per lap.