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Trail Running Calendar near O'Fallon 2026-2027

Monthly updates for O'Fallon

Get new running races (and updates) in your inbox every month.

Explore the top trail runs near O'Fallon for 2026-2027! We've gathered 15 exciting races in the area. Check out our detailed list below to find your next local race.

January 2026
Jan
17-18
Sa - Su

The Shippey Endurance Runs

Trail Run 20 mi 41 mi 61 mi 102 mi
Jan
24
Sa

The Frozen Stick Half Marathon Trail Run

Trail Run 5 mi 13 mi
Jan
31
Sa

Castlewood Cup

Trail Run 15 km
February 2026
Feb
7
Sa

963 Beulah Challenge

Trail Run 13 mi 25 mi 50 km
Feb
22
Su

Bootlegger Trail Run

Trail Run 10 km
March 2026
Mar
8
Su

Quivering Quads Trail Runs

Trail Run 8 mi 13 mi
Mar
28
Sa

Double Chubb 50K

Trail Run 8 mi 25 km 50 km
April 2026
Apr
10-12
Fr - Su

Ozark Foothills Endurance Runs

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

Green Park Viking Dash

Trail Run 5 km
May 2026
May
2
Sa

The Spring Sprung Ruck and Half Marathon

Trail Run 5 km 10 km Half Marathon
May
2
Sa

The Piasa

Trail Run 13 km 25 km 50 km
June 2026
Jun
7
Su

Baby Shippey

Trail Run 6 mi 13 mi
Jun
27-28
Sa - Su

Dark 2 Dawn Night Trail Races

Trail Run 10 km 6 hr 9 hr
August 2026
Aug
29
Sa

The Labor Day Slay

Trail Run 5 km 10 km Half Marathon
October 2026
Oct
24
Sa

Babler Bongo 15K Trail Race

Trail Run 15 km