Skip to main content
SPORTPLAN
DiscoverTop RacesBlogCalculators
Sign in
SPORTPLAN

A clearer way to discover events, build your season, and keep results in one place.

DiscoverAboutContactPrivacy Policy
Email us

© 2026 SportPlan. All rights reserved.

by Dockia Labs

SPORTPLAN

A clearer way to discover events, build your season, and keep results in one place.

Email us

Product

  • Discover
  • Top Races
  • Blog
  • Calculators
  • By country

Sports

  • Running
  • Trail Running
  • Triathlon
  • Gravel
  • Road Cycling
  • HYROX
  • OCR / Spartan
  • Swimming

Cities

  • Barcelona
  • Madrid
  • Valencia
  • Sevilla
  • Bilbao
  • Málaga
  • Girona
  • Zaragoza

Company

  • About
  • Contact
  • Privacy Policy
  • Terms of Service
  • Cookie Policy

© 2026 SportPlan. All rights reserved.

by Dockia Labs

DiscoverTop RacesSign in
Marathons in Illinois 2026 | SportPlan
marathons

Marathons in Illinois

15 upcoming marathons in Illinois. Filter by date, exact distance, or elevation.

Browse by month

15 events found

15 eventos

Sort: recommended
DateEventSportLocationDist.15
14JUN
Father's Day Run
Trail Running21.1 kmMenomonee Falls
Trail Running
Menomonee Falls
21.1 km
27JUN
Independence Day Run
Trail Running21.1 kmWaukesha
Trail Running
Waukesha
21.1 km
1AUG
National Watermelon Day Run
Trail Running21.1 kmHartford
Trail Running
Hartford
21.1 km
8AUG
Swifty Fun Run
Trail Running21.1 kmSt. Louis
Trail Running
St. Louis
21.1 km
15AUG
RAMP River Run
Trail Running21.1 kmRockford
Trail Running
Rockford
21.1 km
29AUG
Corps of Discovery Half Marathon, 8 Mile & 5 Mile
Trail Running21.1 kmSaint Charles
Trail Running
Saint Charles
21.1 km
29AUG
The Labor Day Slay
Trail Running21.1 kmSt. Louis
Trail Running
St. Louis
21.1 km
5SEP
Naperville Trails Half Marathon
Trail Running21.1 kmNaperville
Trail Running
Naperville
21.1 km
12SEP
Mt. Baldhead Challenge
Trail Running21.1 kmSaugatuck
Trail Running
Saugatuck
21.1 km
13SEP
Sorta Mountain Stage Race
Trail Running21.1 kmClark County
Trail Running
Clark County
21.1 km
20SEP
Adrenaline Races
Trail Running21.1 kmWest Bend
Trail Running
West Bend
21.1 km
26SEP
Run for the Hills
Trail Running21.1 kmMcHenry County
Trail Running
McHenry County
21.1 km
3OCT
FLATS Trail Half Marathon
Trail Running21.1 kmKirksville
Trail Running
Kirksville
21.1 km
17OCT
Chicago Fall Classic Half Marathon 10K & 5K
Trail Running21.1 kmChicago
Trail Running
Chicago
21.1 km
4APR
The Trailbreaker
Trail Running21.1 kmWaukesha
Trail Running
Waukesha
21.1 km
Home
Discover
Illinois
10K races in Illinois
Half marathons in Illinois
Ultras in Illinois
All distances in Illinois
January
February
March
April
May
June
July
August
September
October
November
December