Corps of Discovery Trail Races

Ready to follow in the footsteps of legends? The St. Louis Track Club invites you to the bluffs of the Missouri River for the 2026 Corps of Discovery Trail Races. Whether you're looking for a fast-and-flowy 5-miler or a hilly half marathon, these historic trails have a challenge waiting for you. ⚠️ SLTC Member Perk: Current members receive an automatic $10 discount at checkout! (Make sure to use the email associated with your membership). Not a member yet? Click here to join and save! Choose your Adventure All distances kick off at 8:00 AM from the Lewis & Clark Trailhead in Weldon Spring. The Clark (5 Miles): A single, scenic loop of the Clark Trail. Perfect for those new to trails or looking to burn through the hardwood-lined ridges. The Lewis (8 Miles): A rugged loop of the Lewis Trail featuring stunning river views and hollow-to-ridge climbs. The Expedition (Half Marathon): The ultimate test. You’ll conquer the 8-mile Lewis loop first, then head back out to tackle the 5-mile Clark loop. View the courses: 5-Mile Map | 8-Mile Map | Half Marathon Map Swag & Awards The deadline: Register by August 15th to guarantee your race shirt. All race finishers will receive a medal. Overall awards (1st, 2nd, and 3rd place) will be given to female, male and non-binary winners for each distance. Race Day Logistics: ⏱️ Schedule & Cut-offs 6:30 AM: Packet Pick-up opens near the start line. 8-8:10 AM: Race waves begin (Half Marathon, 8 Mile, 5 Mile). 12:00 PM: Course officially closes (4-hour limit).  Pace requirements: 5-Mile distance: 48-minute/mile 8-Mile distance: 30-minute/mile Half Marathon distance: 18:19-minute/mile. Half marathon participants must start the 5-mile Clark Trail loop by 10:30 a.m. ♻️ Cup-Free Policy In our mission to keep the Weldon Spring Conservation Area pristine, this is a CUP-FREE event. No paper cups will be provided. Please carry your own bottle or hydration pack. We will provide plenty of water and Tailwind Nutrition at our ai