When does the Corps of Discovery Trail Races sell out?

Corps of Discovery Trail Races hasn't published a hard registration deadline. Most races of this size raise the entry fee in tiers (early-bird, regular, late) and can sell out without warning — sign up early if you're committed.

Half Marathon

Trail

Corps of Discovery Trail Races

Q: How hard is the Corps of Discovery Trail Races Half Marathon?

Corps of Discovery Trail Races is a Half Marathon on a trail course in Saint Charles, Missouri. We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.

Q: What should I wear for the Corps of Discovery Trail Races?

Race-day weather in Saint Charles can swing year over year, so dress for the forecast on the day. As a rule of thumb, dress for ~10°F warmer than the standing temperature once you start running. Layer with a throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, and a singlet plus a visor when it climbs above 60°F. The published start time is 8:00 AM. Check the race-day weather forecast on this page closer to the date for a specific recommendation.

August 29, 2026

Saint Charles, Missouri

Rolling Course

Decision scores

Six 0–100 scores telling you, at a glance, who this race is for.

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Best for

Trail / hill challenge

About the Race

***St. Louis Track Club members will automatically receive a $10 discount (use the same email address that you use for your member registration). Not a member? Click here to join. *** St. Louis Track Club is excited to invite everyone to join the Corps of Discovery Trail Races, held on the Lewis & Clark Trails in the beautiful Weldon Spring Conservation Area on August 29, 2026. Course Description: The half-marathon course covers approximately 13.1 miles and begin from the Lewis & Clark trailh...

Course Profile

Course profile data unavailable for this race.

Course features

Terrain

trail

Surface

Trail

Elevation gain

Not measured

Course type

Not stated

Field size

Unknown

Boston qualifier

Course map

Not yet published

Elevation profile

Not measured

Accessibility & inclusion

Walker-friendly

Stroller-friendly

Dog-friendly

Kids race

Vibe & community

We don't have vibe tags for this race yet — organizers can claim the listing to add them.

No charity partner listed.

History & past results

Years running

Unknown — claim to add

Recurrence

Annual (assumed)

Past finisher times and year-over-year participation will appear here once the organizer publishes them.

Reviews

No reviews yet

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Common questions

How hard is the Corps of Discovery Trail Races Half Marathon?

We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.

What should I wear?

Dress for ~10°F warmer than the standing temperature once you start running. Throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, singlet plus visor when it climbs above 60°F. The race-day forecast above is the source of truth closer to the date.