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Half Marathon Calendar near Defiance 2026-2027

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Explore the top half marathons near Defiance for 2026-2027! We've gathered 33 exciting races in the area. Check out our detailed list below to find your next local race.

August 2026
Aug
22
Sa

The Next Loop - Cliff Cave

Trail Run 5 km 10 km ... 40 mi 50 mi
Aug
23
Su

370 Lakeside Triathlon

Triathlon Duathlon Aquathlon Sprint 750 m 5 km Olympic 1.5 10 km Middle distance 1.2 13.1 mi Sprint 750 m 23 km
Aug
29
Sa

Corps of Discovery Trail Races

Trail Run 5 mi 8 mi 13 mi
September 2026
Sep
5
Sa

The Labor Day Slay

Trail Run 5 km 10 km 13 mi
Sep
9
We

St. Louis Sunrise Wish Run

5 km 10 km Half Marathon 50 km
Monthly updates for Defiance

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Sep
13
Su

Lap the Lake Race Series

5 km 10 mi Half Marathon
Sep
26
Sa

Rockin' Rockwoods 53K and 1/2 Marathon

Trail Run 13 mi 53 km
Sep
27
Su

The Whiskey Run - St. Louis / St. Charles

Trail Run 5 km 10 km Half Marathon
October 2026
Oct
3
Sa

She Dreams Bigger - Women's Run

5 km 10 km Half Marathon
Oct
24-25
Sa - Su

The Great St. Louis Halloween Race

5 km 10 km 13 mi
Oct
24
Sa

The Innsbrook Half Marathon

10 km 13 mi
Oct
24
Sa

The Equalizer Run & Recover-Fest

Road Race Trail Run 5 mi 13 mi
Oct
25
Su

Quivering Quads Fall Classic

Trail Run 8 mi Half Marathon
Oct-Nov
31-1
Sa - Su

The Skippo Trail Race

Trail Run 10 km Half Marathon ... 31 km 40 km
November 2026
Nov
8
Su

Mo' Cowbell Marathon

3 mi 6 mi 13 mi 26 mi
Nov
15
Su

Run Santa Run - Saint Charles

5 km 10 km Half Marathon
Nov
21
Sa

Go Girl Run - St. Louis

5 km Half Marathon
Nov
28
Sa

Bodies Race Company - Ballwin

Trail Run 3 mi 6 mi 13 mi
December 2026
Dec
5
Sa

Wildwood Trail Marathon

Trail Run 10 km Half Marathon Marathon
Dec-Feb
19-13
Sa

Stick Season Trail Run Series

Trail Run 4 mi 8 km 10 km Half Marathon
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