Illinois Ultra Races

Upcoming ultra races in Illinois, sorted by date.

1 Mile 5K 10K 15K 10 Mile Half Marathon Marathon Ultra

Nov 2026

Nov14Sat

Tunnel Hill

Vienna, IL

100 Miles100K50 Miles26.2 Milesregistration closed

Nov14Sat

The Forge Trail Run Festival

Lemont, IL · from $70

37.2 Miles18.6 Miles13.1 Miles6.2 Miles

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Dec 2026

Dec19Sat

Tour de Trails

Rockford, IL · from $25

30 Miles12 Miles9 Miles6 Miles3 Miles

Jan 2027

Jan1Fri

1000 Mile Challenge - 2027 Midwest

Edwardsville, IL

1000 Milesregistration closed

Feb 2027

Feb20Sat

Kennekuk Road Runners - Members Only Fat Ass

Danville, IL

28.4 Miles

May 2027

May22Sat

Red Cedar Trail Races at Giant City State Park

Makanda, IL · from $15

50 Miles26 Miles13.6 Miles5K

Aug 2027

Aug7Sat

Highlander Assault Obstacle Race

Pingree Grove, IL · from $65

50K15K5K

Sep 2027

Sep3Fri

The Ultimate SUCK

Cuba, IL · from $109

50 Miles25 Miles10 Miles

Pace calculator →

Pace, finish time, race predictions and training paces.

Mile-by-mile pace band →

Printable splits with negative-split and hill adjustments.

Race listings come from RunSignup. Dates, prices and details can change, so confirm on the race's registration page.