American Bottoms 100

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

The route follows scenic levees and hardball roads along the Mississippi River through the historic American Bottom region, including landmarks like Piggott's Fort and Fort de Chartres. The course is flat and fast, with modest elevation gains (700 ft for 55 miles, 1,400 ft for 110 miles) and generous cutoff times. Runners enjoy a friendly atmosphere, multiple aid stations, and the chance for a personal best on a low-cost, no-frills ultra. Visit the organization's website for the most recent information.