Corps of Discovery Trail Races

St. Louis Track Club is excited to invite everyone to join the 2025 Corps of Discovery Trail races, held in the beautiful Weldon Spring Conservation Area on August 30th, 2025.

New this year, join us for the 8-Mile option!

Course Description:

The course will cover approximately 13.1 miles and begin from the Lewis & Clark trailhead in the Weldon Spring Conservation Area off Hwy 94. Half marathon participants will first run the 8-mile Lewis trail and then the 5-mile Clark trail. The course will travel counterclockwise and will not be closed to outside use. There will be markings along the course and a volunteer where the trails split. The 5-mile option will cover 1 loop of the Clark trail and the 8-mile option will cover 1 loop of the Lewis trail. The trail winds itself along the bluffs of the Missouri River down the hardwood-lined ridges and into the hollows so all participants will have something to enjoy.

Both distances start at 8:00 AM

$75 - Half Marathon ($80 after 7/1/2025)

$65 - 8 mile race ($70 after 7/1/2025)

$55 - 5 mile race ($60 after 7/1/2025)

Sign up before August 15th to guarantee a T-shirt! All runners registered before this date will receive a t-shirt and a finisher's medal. 

Become a member of the St. Louis Track Club and get an additional discount on registration. You can join during registration for the race.

Thank you to our sponsor Tailwind Nutrition!

Race Day Details:

CUP FREE:
This race is a CUP FREE event. This means that there will be NO paper cups at any of the aid stations. Please carry a water receptacle and fill up as needed with water and/or tailwind, both of which will be available throughout the course.

PARKING:
Parking is in the secondary lot at the Weldon Spring Interpretive Site (7295 RT-94, St. Charles, MO). Please follow the signs and park where guided so as to leave room on the main lot for other trail patrons.

PACKET PICK-UP:
All racers can pick up their packets near the parking lot and race start line on race morning starting at 6:30am. 

CUT-OFF TIMES
The cutoff time is 12pm, or 4 hours. This is approximately an 18-minute pace per mile. The half marathon course brings runners to the Lewis and Clark trailhead at 8ish miles before heading out to do the final 5-mile loop on Clark. Runners must start their 5-mile loop by 10:30am.

DROP BAGS:
We will have a drop bag collection area at the start/finish area. Please mark the bag with your name in case someone has the same one.

RACE START: 
Both distances will start and finish at the Lewis and Clark trailhead. The 5 mile runners will start in quick waves starting at 8AM and the Half Marathon and 8 milers will start in quick waves at 8:05AM. Since parking is across the roadway at the Weldon Spring site, we will have cones set up to warn drivers and give runners a safe way to be along the roadway. Be sure to ay close attention to the roadway and take caution as you cross.