Illinois Half Marathons by Date • By City
Browse all 2021 Illinois half marathons by month below. For each race, you’ll find course maps, elevation profiles, runner reviews, and how to sign up.
When you view a race, you’ll also find contact info if you’re having problems with your registration or need to contact the race directors.
February 2021
| Sat Feb 6 | Iceman Half Marathon & Quarter Marathon | Springfield IL |
| Sat Feb 13 | Fly with the Eagles Half Marathon | Marion IL |
March 2021
| Sat Mar 13 | Cactus Classic Trail Race Marathon Half Marathon & 10K | Manito IL |
| Sun Mar 14 | March Madness Half Marathon | Cary IL |
| Sat Mar 27 | Southern Illinois Spring Classic Half Marathon & 5K | Lawrenceville IL |
April 2021
| Sat Apr 3 | Lake Sara Dam Run | Effingham IL |
| Sat Apr 17 | Riverboat Series Marathon Half Marathon 10K & 5K – Day 7 | Vienna IL |
| Sun Apr 18 | Naperville Women's Half Marathon | Naperville IL |
May 2021
| Sat May 1 | Illinois Marathon Half Marathon 10K 5K & Relay | Champaign IL |
| Sat May 1 | Lake Run Half Marathon 12K 7K & 3-Mile | Hudson IL |
| Sun May 2 | Great Western Half Marathon | St. Charles IL |
| Sat May 8 | Starved Rock Country Marathon & Half Marathon | Ottawa IL |
| Sun May 23 | Chicago Spring Half Marathon & 10K | Chicago IL |
| Sun May 23 | Chicagoland Spring Marathon & Half Marathon | Schaumburg IL |
July 2021
| Tue Jul 13 | Heartland Series Marathon Half Marathon 10K & 5K – Day 4 | Fulton IL |
August 2021
| Sat Aug 21 | RAMP River Run Half Marathon 5K & 3K | Rockford IL |
September 2021
| Sat Sep 4 | Naperville Trails Half Marathon | Naperville IL |
| Sat Sep 11 | Chi Town Half Marathon & 10K | Chicago IL |
| Sat Sep 11 | Hidden Gem Half Marathon | Flossmoor IL |
| Sun Sep 19 | Fox Valley Marathon Half Marathon 20-Mile & 5K | St. Charles IL |
| Sat Sep 25 | Moraine Hills Run for the Hills Half Marathon | McHenry IL |
| Sat Sep 25 | Stone Bridge Half Marathon & 5K | Roscoe IL |
| Sun Sep 26 | Chicago Half Marathon & 5K | Chicago IL |
| Sun Sep 26 | Quad Cities Marathon Half Marathon 5K & Relay | Moline IL |
October 2021
| Sat Oct 2 | Prairie State Half Marathon & 10K | Long Grove IL |
| Sat Oct 9 | Des Plaines River Trail Marathon Half Marathon & 50-Mile | Lincolnshire IL |
| Sat Oct 9 | Sauk Valley Apple Cider Run Half Marathon 10K & 5K | Rock Falls IL |
| Sun Oct 10 | Springfield Marathon Half Marathon & Quarter Marathon | Springfield IL |
| Sun Oct 10 | Whiskeydaddle Races Marathon Half Marathon & Relay | Peoria IL |
| Sat Oct 16 | Country Sole Half Marathon 10K & 5K | Chicago IL |
| Sun Oct 17 | Naperville Half Marathon | Naperville IL |
| Sat Oct 23 | Shawnee Marathon & Half Marathon | Harrisburg IL |
| Sat Oct 23 | Sly Fox Half Madness 10K & 5K | St. Charles IL |
| Sat Oct 30 | Galena River Fall Half Marathon & 8K | Galena IL |
| Sat Oct 30 | H^3 Halloween Half Marathon | Chicago IL |
