Missouri Triathlon Calendar 2025-2026

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Explore the best triathlons in Missouri for 2025-2026! Our updated list features 147 exciting races across the region. Find your next race in Missouri below and join the running community at these great events!

September 2025
Sep
1
Monday

Heart of America Marathon

26 mi
Sep
6
Saturday

Northside Trap Run

5 km
Sep
7
Sunday

Lap the Lake Race Series

5 km 10 mi 13 mi
Sep
7
Sunday

Plaza 10K - Kansas City

10 km
Sep
13
Saturday

Xterra Branson Mountain Man

Triathlon
Sep
13
Saturday

Rockin' Rockwoods 53K and 1/2 Marathon

Trail Run 13 mi 53 km
Sep
13
Saturday

Smithville CIA 5K

5 km
Sep
13
Saturday

The Best Races - Kansas City

5 km 10 km 13 mi
Sep
13
Saturday

Run For Freedom 10K

5 km 10 km
Sep
20
Saturday

Ranney Run 5k

5 km
Sep
21
Sunday

Spooky Sprint - Springfield

5 km 10 km 13 mi
Sep
21
Sunday

Valor Ranch Runnin' For Home 5k

5 km
Sep
21
Sunday

Boulevard 10k

10 km
Sep
27
Saturday

Swifty Fun Run - Kansas City

5 km 10 km 13 mi
Sep
27
Saturday

St. Joseph Missouri Marathon

5 km 10 km 13 mi 26 mi
Sep
27
Saturday

The Piggyback Dash 10K

5 km 10 km
Sep
27
Saturday

Sisters Living Beyond the Ribbon 5K Run/Walk

5 km
Sep
28
Sunday

City of Roses Half Marathon

5 km 13 mi
October 2025
Oct
3
Friday

Leapfrog 5k

5 km
Oct
4
Saturday

Flats Trail Half Marathon

Trail Run 13 mi
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