Marathon Races in Illinois

Find upcoming marathon races in Illinois — with dates, locations, and direct registration links.

86 upcoming marathon races found in Illinois

Upcoming Marathon Races in Illinois

Half Marathon Run+6

Aug 15

RAMP River Run – 3K, 5K, & 1/2 Marathon Run

Sat, August 15, 2026

Rockford, IL

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5K Registration+5

Aug 15

Bagel Run 5K/10K/13.1 CHICAGO/EVANSTON

Sat, August 15, 2026

Chicago, IL

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5K Registration+5

Aug 15

Run for PB& J 5K/10K/13.1 CHICAGO/EVANSTON

Sat, August 15, 2026

Chicago, IL

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The Next Loop Endurance Series 5K, 10K, 1/2 Marathon, Marathon, 50K

Aug 15

The Next Loop Endurance Series - Busse Woods

Sat, August 15, 2026

Elk Grove Village, IL

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100 Miler+5

Aug 22

Shawnee Hills Trail Races

Sat, August 22, 2026

Ozark, IL

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The Next Loop Endurance Series 5K, 10K, 1/2 Marathon, Marathon, 50K

Aug 29

The Next Loop Endurance Series | Half Day Forest Preserve

Sat, August 29, 2026

Vernon Hills, IL

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5K Registration+5

Aug 29

Sloth Run 5K/10K/13.1 CHICAGO/EVANSTON

Sat, August 29, 2026

Chicago, IL

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5K Registration+5

Aug 29

Run to Breast Cancer 5K/10K/13.1 CHICAGO/EVANSTON

Sat, August 29, 2026

Chicago, IL

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Half Marathon+5

Sep 5

Naperville Trails Half Marathon & 10K

Sat, September 5, 2026

Wheaton, IL

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Half Marathon

Sep 6

Crystal Lake Half Marathon

Sun, September 6, 2026

Crystal Lake, IL

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5K Registration+5

Sep 12

Run for Mental Health 5K/10K/13.1 CHICAGO/EVANSTON

Sat, September 12, 2026

Chicago, IL

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Half Marathon

Sep 12

Hidden Gem Half Marathon

Sat, September 12, 2026

Flossmoor, IL

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5K Registration+5

Sep 12

National Chocolate Day: Run for Chocolates 5K/10K/13.1 CHICAGO/EVANSTON

Sat, September 12, 2026

Chicago, IL

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5k+1

Sep 19

Run Like A Diva

Sat, September 19, 2026

Chicago, IL

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1 Mile Walk - FREE+3

Sep 19

St. Jude Walk

Sat, September 19, 2026

Bloomington, IL

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Fleet Feet Training Member+8

Sep 19

Fleet Feet Training - The Long Run

Sat, September 19, 2026

Chicago, IL

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Half Marathon+1

Sep 20

Fox Valley Marathon, Half Marathon, 20-Mile & 5K

Sun, September 20, 2026

St Charles, IL

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Half Marathon+1

Sep 26

Moraine Hills Run for the Hills Half Marathon & 10k

Sat, September 26, 2026

McHenry, IL

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1/2 Marathon+1

Sep 26

Stone Bridge Half Marathon and 5k

Sat, September 26, 2026

Roscoe, IL

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5K Registration+5

Sep 26

Oktoberfest Run 5K/10K/13.1 CHICAGO/EVANSTON

Sat, September 26, 2026

Chicago, IL

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5K Registration+5

Sep 26

Run for Donuts 5K/10K/13.1 CHICAGO/EVANSTON

Sat, September 26, 2026

Chicago, IL

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Belleville Main Street Marathon+1

Sep 26

Belleville Main Street Marathon & Half Marathon

Sat, September 26, 2026

Belleville, IL

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Half Marathon+1

Sep 27

Quad Cities Marathon, Half Marathon & 5k

Sun, September 27, 2026

Moline, IL

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Kid's Dash+7

Sep 27

Golden Harvest Half Marathon & 5k/10k - Greater Chicago

Sun, September 27, 2026

Greater Chicago, IL

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Half Marathon+10

Oct 3

Long Grove's Oktoberfest Half Marathon, 10K & 5K

Sat, October 3, 2026

Long Grove, IL

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Half Marathon+10

Oct 3

Long Grove's Prairie State Half Marathon, 10K & Oktoberfest 5K

Sat, October 3, 2026

Long Grove, IL

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5K Registration+5

Oct 10

Bagel Run 5K/10K/13.1 CHICAGO/EVANSTON

Sat, October 10, 2026

Chicago, IL

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Half Marathon+1

Oct 10

Des Plaines River Trail Races Half Marathon

Sat, October 10, 2026

Lincolnshire, IL

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5K Registration+5

Oct 10

Coffee Lovers Run 5K/10K/13.1 CHICAGO/EVANSTON

Sat, October 10, 2026

Chicago, IL

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Half Marathon+2

Oct 10

Sauk Valley Apple Cider Run

Sat, October 10, 2026

Rock Falls, IL

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