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Fall half marathons near St. Louis (2026)

Updated November 7, 2026

4 half marathons are on the calendar near St. Louis in fall 2026, starting with MO' Cowbell Marathon/Half-Marathon/10K/5K on Sunday, November 8 in Saint Charles. That covers September to November. 1 of them publish an upcoming price increase, so signing up early saves money.

All fall races5K races (24)10K races (4)Half marathons (4)Marathons (2)Trail races (6)

• Sun8Nov

  MO' Cowbell Marathon/Half-Marathon/10K/5K

  Sun Nov 8 · 7:30 AM · Saint Charles · St. Charles County

  5K10KHalf marathonMarathon

  from $75Sign up ↗
• Sun8Nov

  Saint Louis Track Club Half Marathon and 5K

  Sun Nov 8 · 7:30 AM · Saint Louis · St. Louis & Inner Suburbs

  5KHalf marathon

  from $75Sign up ↗
• Sat21Nov

  Go Girl Run | St. Louis

  Fri Nov 20 – Sat Nov 21 · 8:00 AM · St Louis · St. Louis & Inner Suburbs

  1 mile · Fri5KHalf marathon

  from $20Sign up ↗
• Sat28Nov

  Turkey Trails - St. Louis

  Sat Nov 28 · 8:00 AM · Maryland Heights · West County & Chesterfield

  1 mile5K10KHalf marathonTrail

  from $22Goes up Nov 9Sign up ↗

• Winter 2026-2719 races
• Spring 202717 races
• Summer 20278 races

Quick answers

How many half marathons are near St. Louis in fall 2026?

4 half marathons are listed near St. Louis in fall 2026. The first is MO' Cowbell Marathon/Half-Marathon/10K/5K on Sunday, November 8 in Saint Charles, and the last is Turkey Trails - St. Louis on November 28.

What is the cheapest half marathon near St. Louis in fall 2026?

Go Girl Run | St. Louis on November 21 has the lowest listed entry fee: $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.

Are there half marathons or marathons near St. Louis in fall 2026?

Yes: 4 half marathons and 1 marathon. The first is MO' Cowbell Marathon/Half-Marathon/10K/5K on November 8.