Trail Races & Ultramarathons Near St. Louis, MO
As of October 6, 2026, Crewable lists 18 upcoming trail races and ultramarathons near St. Louis, MO from October 2026 to June 2027. The next is Backyard Ultra in New Town (Oct 10 8:00AM) on October 10 in Saint Charles, MO. Registration is open for 4. One advertises prize money.
Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites
With aid station data
10 aid
1 aid
2 aid.jpg)
2 aidRace calendar
October 2026
6 racesBackyard Ultra in New Town (Oct 10 8:00AM)
Saint Charles, MOBackyard Ultra2.6 miPrize moneyOpen until Oct 11from $25
November 2026
1 raceDecember 2026
1 raceJanuary 2027
3 racesFebruary 2027
1 raceMarch 2027
2 racesApril 2027
3 racesJune 2027
1 raceQuick answers
What is the next trail race or ultramarathon near St. Louis, MO?
Backyard Ultra in New Town (Oct 10 8:00AM), on Saturday, October 10, 2026, in Saint Charles, MO. Distances: Backyard Ultra, 2.6 mi.
What is the closest trail race or ultramarathon to St. Louis?
Minnie Ha Ha 6 & 12 Hour Endurance Runs in St. Louis, MO, about 1 mile from St. Louis, on October 17, 2026.
How many trail races and ultramarathons near St. Louis, MO have open registration?
4 of the 18 list registration as open as of October 6, 2026, including Backyard Ultra in New Town (Oct 10 8:00AM), DeClue Loop Trail Race and The Shippey Endurance Runs.
Which trail races and ultramarathons near St. Louis, MO offer prize money?
One race advertises prize money.
How many of the trail races near St. Louis, MO are ultramarathons?
14 of the 18 are ultramarathons (longer than a marathon, or a backyard, timed or 200+ mile format). The other 4 are shorter races.
What is the busiest month for trail races and ultramarathons near St. Louis, MO?
October 2026, with 6 of the 18. January 2027 follows with 3.
Nearby cities
Nearby states
More ways to browse
Race planning
Plan your St. Louis race
Aid stations, cutoffs and pacing in one free plan. Crew invites and race-day updates come with a Race Pass.
Plan a race free