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Spring half marathons near St. Louis (2027)

Updated November 6, 2026

9 half marathons are on the calendar near St. Louis in spring 2027, starting with Time to Paddy 5K/10K & Lucky 13.1 - St Louis on Sunday, March 7 in St Louis. That covers March to May. 8 of them publish an upcoming price increase, so signing up early saves money.

All spring races5K races (14)10K races (9)Half marathons (9)Trail races (5)

• Sun7Mar

  Time to Paddy 5K/10K & Lucky 13.1 - St Louis

  Sun Mar 7 · 8:00 AM · St Louis · St. Louis & Inner Suburbs

  1 mile5K10KHalf marathon

  from $22Goes up Nov 10Sign up ↗
• Sat13Mar

  Creve Coeur St. Paddy's Half Marathon, 10K & 5K Run/Walk

  Sat Mar 13 · 8:15 AM · Maryland Heights · West County & Chesterfield

  5K10KHalf marathon

  from $12.99Sign up ↗
• Sat3Apr

  St. Louis Marathon

  Sat Apr 3 · 7:00 AM · St. Louis · St. Louis & Inner Suburbs

  1 mileHalf marathonMarathon

  from $25Goes up Dec 1Sign up ↗
• Sat3Apr

  Students on the GO!

  Sat Apr 3 · 7:00 AM · Saint Louis · St. Louis & Inner Suburbs

  Half marathon

  from $50Goes up Feb 6Sign up ↗
• Sat17Apr

  DoNot Stop Half Marathon/5K/10K - St. Louis

  Sat Apr 17 · 8:00 AM · Maryland Heights · West County & Chesterfield

  1 mile5K10KHalf marathon

  from $22Goes up Dec 21Sign up ↗
• Sat1May

  The Spring Sprung 5k-10k 10K Ruck and Half Marathon

  Sat May 1 · 8:00 AM · Ballwin · West County & Chesterfield

  5K10KHalf marathonTrail

  from $39Goes up Apr 3Sign up ↗
• Sat1May

  Drink MO Wine Run - 1 Mile, 5K, 10K & Half Marathon

  Sat May 1 · 9:00 AM · Augusta · St. Charles County

  1 mile5K10KHalf marathonTrail

  from $27.50Goes up Dec 20Sign up ↗
• Sun2May

  Hometown Half Marathon/5K/10K - St Louis

  Sun May 2 · 7:00 AM · St Louis · St. Louis & Inner Suburbs

  1 mile5K10KHalf marathon

  from $22Goes up Jan 5Sign up ↗
• Sat15May

  Love to Run St. Charles - 5K | 10K | Half Marathon

  Sat May 15 · 7:00 AM · Saint Charles · St. Charles County

  5K10KHalf marathonTrail

  from $30Goes up Dec 15Sign up ↗

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Quick answers

How many half marathons are near St. Louis in spring 2027?

9 half marathons are listed near St. Louis in spring 2027. The first is Time to Paddy 5K/10K & Lucky 13.1 - St Louis on Sunday, March 7 in St Louis, and the last is Love to Run St. Charles - 5K | 10K | Half Marathon on May 15.

What is the cheapest half marathon near St. Louis in spring 2027?

Creve Coeur St. Paddy's Half Marathon, 10K & 5K Run/Walk on March 13 has the lowest listed entry fee: $12.99. Prices are before the registration platform's processing fee.

When does the next early-bird price end for half marathons near St. Louis?

Time to Paddy 5K/10K & Lucky 13.1 - St Louis: the Half marathon goes from $56 to $62 after November 10. 7 more of these half marathons publish a later price increase.

Are there half marathons or marathons near St. Louis in spring 2027?

Yes: 9 half marathons and 1 marathon. The first is Time to Paddy 5K/10K & Lucky 13.1 - St Louis on March 7.