Missouri Triathlon Calendar 2025-2026

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Explore the best triathlons in Missouri for 2025-2026! Our updated list features 153 exciting races across the region. Find your next race in Missouri below and join the running community at these great events!

January 2026
Jan
24
Saturday

Time Travel Half-Marathon - St. Louis

5 km 10 km 13 mi
February 2026
Feb
1
Sunday

Groundhog Run

5 km 10 km
Feb
7
Saturday

Castlewood Cup

Trail Run 15 km
Feb
7
Saturday

963 Beulah Challenge

Trail Run 12 mi 3 hr ... 6 hr 9 hr
Feb
7
Saturday

The Best Races - Kansas City

5 km 10 km 13 mi
Feb
13
Friday

Iron Heart

Trail Run 5 km 5 mi ... 100 km 100 mi
Feb
14
Saturday

Runnin' Against Multiple Sclerosis 5k

5 km
Feb
14
Saturday

The Best Races - Kansas City

5 km 10 km 13 mi
Feb
21
Saturday

Flat Branch Ultra

Trail Run 50 km
Feb
28
Saturday

Shrewsbury Thrifty Fifty

1 hr 50 km 50 mi
March 2026
Mar
6
Friday

Queeny Backyard Ultra

Backyard Ultra 4 mi
Mar
7
Saturday

Whobilation

5 km
Mar
7
Saturday

Hard Times Trail Run - Willard, MO

Trail Run 8 mi 25 km 50 km
Mar
7
Saturday

Running From Yeti - Kansas City, MO

5 km 10 km 13 mi
Mar
14
Saturday

Westport St. Patrick's Day Run

4 mi
Mar
14
Saturday

The Best Races - Kansas City

5 km 10 km 13 mi
April 2026
Apr
4
Saturday

Wolf Creek Trail Run

Trail Run 6 km 13 mi
Apr
4
Saturday

The Best Races - Kansas City

5 km 10 km 13 mi
Apr
10-12
Fr - Su

Ozark Foothills Endurance Runs

Trail Run 25 km 26 mi ... 100 km 100 mi
Apr
11
Saturday

Bridge and Dam

5 km 10 km 13 mi
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