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Marathon Calendar near O'Fallon 2026-2027

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Explore the top marathons near O'Fallon for 2026-2027! We've gathered 4 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 ... 26 mi 50 km
September 2026
Sep
26
Sa

Belleville Main Street Marathon

13 mi 26 mi
November 2026
Nov
22
Su

St. Louis Marathon Relay

26 mi
April 2027
Apr
3
Sa

Greater St. Louis Marathon

5 km 10 km Half Marathon Marathon
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