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Triathlon Calendar near Lake Saint Louis 2025-2026

Explore the top triathlons near Lake Saint Louis for 2025-2026! We've gathered 46 exciting races in the area. Check out our detailed list below to find your next local race.

April 2026
Apr
10-12
Fr - Su

Ozark Foothills Endurance Runs

Trail Run 25 km 26 mi ... 100 km 100 mi
Apr
18
Saturday

DoNot Stop Half Marathon - St. Louis

5 km 10 km 13 mi
May 2026
May
16
Saturday

The Spring Sprung Half Marathon

5 km 10 km 13 mi
May
16
Saturday

Washington Police Explorers Post 2438 5k Run

5 km
June 2026
Jun
7
Sunday

Baby Shippey

Trail Run 6 mi 13 mi
July 2026
Jul
4
Saturday

Rockin' Riverfest Half Marathon

5 km 10 km 13 mi
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