American Bottoms 100

The American Bottoms 100 is a unique ultra running event held in Columbia, Illinois, near St. Louis. It features two distances: a 110-mile out-and-back and a 55-mile point-to-point race.

The course follows the scenic Mississippi River through the historic American Bottom, including landmarks like Piggott's Fort and Fort de Chartres. Runners traverse mostly levees and hardball roads on a flat, fast course with minimal elevation gain (700 ft for 55 miles, 1,400 ft for 110 miles). The race offers generous cut-off times, multiple aid stations, and a friendly atmosphere, making it ideal for first-time hundred milers or those seeking a personal best. Visit the organization's website for the most recent information.