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Half marathons near St. Louis (2026-27)
Updated
8 half marathons are coming up near St. Louis in the next 90 days; the next is MO' Cowbell Marathon/Half-Marathon/10K/5K on Sunday, November 8 in Saint Charles. 27 half marathons are listed near St. Louis for the next 12 months; the next one starts from $75.
All St. LouisSt. Louis & Inner Suburbs (14)West County & Chesterfield (9)St. Charles County (4)
By date
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Sun Nov 8 · 7:30 AM · Saint Charles · St. Charles County
5K10KHalf marathonMarathon
from $75Sign up ↗ -
Sun Nov 8 · 7:30 AM · Saint Louis · St. Louis & Inner Suburbs
5KHalf marathon
from $75Sign up ↗ -
Fri Nov 20 – Sat Nov 21 · 8:00 AM · St Louis · St. Louis & Inner Suburbs
1 mile · Fri5KHalf marathon
from $20Sign up ↗ -
Sat Nov 28 · 8:00 AM · Maryland Heights · West County & Chesterfield
1 mile5K10KHalf marathonTrail
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Sat Dec 12 · 8:00 AM · Saint Louis · St. Louis & Inner Suburbs
3K2 miles · Dec 265K · Jan 94 miles · Jan 2312K15K · Feb 6
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Sun Jan 3 · 8:00 AM · Saint Louis · St. Louis & Inner Suburbs
1 mile5K10KHalf marathonTrail
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Sun Jan 3 · 9:00 AM · Maryland Heights · West County & Chesterfield
1 mile5K10KHalf marathon
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Sat Jan 16 · 9:00 AM · Glencoe · West County & Chesterfield
4 miles5.5 miles · Jan 3010KHalf marathon · Jan 30Trail
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Sat Feb 13 · 8:05 AM · St. Louis · St. Louis & Inner Suburbs
5K10K9.3 milesHalf marathon
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Sat Feb 13 · 9:00 AM · Glencoe · West County & Chesterfield
5KHalf marathonTrail
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Sun Mar 7 · 8:00 AM · St Louis · St. Louis & Inner Suburbs
1 mile5K10KHalf marathon
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Sat Mar 13 · 8:15 AM · Maryland Heights · West County & Chesterfield
5K10KHalf marathon
from $12.99Sign up ↗ -
Sat Apr 3 · 7:00 AM · St. Louis · St. Louis & Inner Suburbs
1 mileHalf marathonMarathon
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Sat Apr 17 · 8:00 AM · Maryland Heights · West County & Chesterfield
1 mile5K10KHalf marathon
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Sat May 1 · 8:00 AM · Ballwin · West County & Chesterfield
5K10KHalf marathonTrail
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Sat May 1 · 9:00 AM · Augusta · St. Charles County
1 mile5K10KHalf marathonTrail
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Sun May 2 · 7:00 AM · St Louis · St. Louis & Inner Suburbs
1 mile5K10KHalf marathon
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Sat May 15 · 7:00 AM · Saint Charles · St. Charles County
5K10KHalf marathonTrail
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Sat Jul 3 · 7:30 AM · St Charles · St. Charles County
5K10KHalf marathonTrail
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Sat Jul 31 · 7:00 AM · St. Louis · St. Louis & Inner Suburbs
1 mile5K10KHalf marathon
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Sat Aug 7 · 7:00 AM · Maryland Heights · West County & Chesterfield
1 mile5K10KHalf marathon
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Sat Aug 14 · 7:00 AM · Saint Louis · St. Louis & Inner Suburbs
1 mile5K10KHalf marathon
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Sat Sep 4 · 7:30 AM · St Louis · St. Louis & Inner Suburbs
5K10KHalf marathonTrail
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Sat Oct 2 · 7:00 AM · Maryland Heights · West County & Chesterfield
1 mile5K10KHalf marathon
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Sat Oct 2 · 8:00 AM · St. Louis · St. Louis & Inner Suburbs
1 mile5K10KHalf marathon
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Sat Oct 23 · 9:00 AM · St. Louis · St. Louis & Inner Suburbs
1 mile5K10KHalf marathon
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Quick answers
How many half marathons are near St. Louis in the next 3 months?
8 half marathons are listed near St. Louis between November 7 and February 5. The next is MO' Cowbell Marathon/Half-Marathon/10K/5K on Sunday, November 8 in Saint Charles.
What is the cheapest half marathon near St. Louis right now?
Go Girl Run | St. Louis on November 21 has the lowest listed entry fee in the next 90 days: $20. Prices are before the registration platform's processing fee.
When does the next early-bird price end for half marathons near St. Louis?
Turkey Trails - St. Louis: the 5K goes from $40 to $44 after November 9. 22 more of these half marathons publish a later price increase.
Are there half marathons near St. Louis this weekend?
Yes, 2: MO' Cowbell Marathon/Half-Marathon/10K/5K (Sun) and Saint Louis Track Club Half Marathon and 5K (Sun).