Corps of Discovery Trail Races

The Corps of Discovery Trail Races, hosted by the St. Louis Track Club, take place in the scenic Weldon Spring Conservation Area, Missouri. The event offers three distances: a 5-mile Clark Trail, an 8-mile Lewis Trail (new in 2025), and a half marathon combining both trails for a total of 13.1 miles.

Runners navigate rugged upland forests, steep bluffs, and hardwood-lined ridges with views of the Missouri River. The course is marked and runs counterclockwise, providing a challenging and historic trail running experience along the Lewis & Clark trails. Participants receive a T-shirt and finisher's medal if registered early. Visit the organization's website for the most recent information.