McNaughton Park Trail Runs

The McNaughton Park Trail Runs, over distances of 50, 100, 150 and 200 miles (320 km), is an annual ultramarathon running event held in Pekin, Illinois each spring on a rugged, ten-mile (16 km) loop course. All four races are run concurrently. The 150 and 200-mile (320 km) ultra are the only ones of that distance held in Illinois.

The loop course is primarily a single lane footpath, through natural countryside including forests and meadows. Each ten-mile (16 km) loop provides approximately 1,600 feet (490 m) of elevation gain.

A thirty mile run, part of the event through 2006, was replaced by a 150-mile (240 km) option beginning in 2007.