Marathons in Illinois, United States
63 upcoming races are listed in Illinois, including 22 marathons, 51 half marathons and 24 ultras. The next is Belleville Main Street Marathon & Half Marathon on September 26, 2026.
October has the most races, and a typical entry costs $60–75. Race pages link the official source where we have one. Confirm dates and prices with the organizer before you register.
63
Races listed
22
Marathons
October
Busiest month
$60–75
Typical entry
16 Jun
Last updated
| Date | Race | City | Distances | From |
|---|---|---|---|---|
| 26 Sep 2026 26Sep 26 | Belleville Main Street Marathon & Half Marathon | Belleville | 42.2K · 21.1K | - |
| 26 Sep 2026 26Sep 26 | Half Day at the Lake | Evanston | 12 Hour · 6 Hour | - |
| 26 Sep 2026 26Sep 26 | Moraine Hills Run for the Hills | McHenry | 21.1K · Virtual | - |
| 26 Sep 2026 26Sep 26 | Oktoberfest Run 5K/10K/13.1 CHICAGO/EVANSTON | Chicago | 42.2K · 21.1K · 10K | - |
| 26 Sep 2026 26Sep 26 | Stone Bridge Half Marathon and 5k | Roscoe | 21.1K · 5K | - |
| 27 Sep 2026 27Sep 26 | Golden Harvest Half Marathon & 5k/10k - Greater Chicago | Greater Chicago | 21.1K · 10K · 5K | - |
| 27 Sep 2026 27Sep 26 | Life Time Chicago Half Marathon + 5K | Chicago | 21.1K · 5K | - |
| 27 Sep 2026 27Sep 26 | TBK Bank Quad Cities Marathon | Moline | 42.2K · 21.1K · 10K | $65–$130 |
| 3 Oct 2026 03Oct 26 | Galena Trail Run | Galena | 50K · 42.2K · 21.1K | $60–$110 |
| 3 Oct 2026 03Oct 26 | Long Grove's Oktoberfest Half Marathon, 10K & 5K | Long Grove | 21.1K · 10K · 5K | - |
| 4 Oct 2026 04Oct 26 | Harvest Wind Half Marathon & 10K | Illinois | Ultra · 21.1K · 10K | - |
| 10 Oct 2026 10Oct 26 | Bagel Run 5K/10K/13.1 CHICAGO/EVANSTON | Chicago | 42.2K · 21.1K · 10K | - |
| 10 Oct 2026 10Oct 26 | Nik's Home Run 7K | Illinois | Ultra · 7K · 2.4K | - |
| 10 Oct 2026 10Oct 26 | Sauk Valley Apple Cider Run | Rock Falls | 21.1K · 5K · Virtual | - |
| 11 Oct 2026 11Oct 26 | Bank of America Chicago Marathon | Chicago | 42.2K | $230 |
| 17 Oct 2026 17Oct 26 | Chicago Fall Classic Half Marathon, 10K & Hot Cider Hustle 5K | Chicago | 21.1K · 10K · 5K | - |
| 17 Oct 2026 17Oct 26 | Country Sole Half Marathon | Illinois | Ultra · 21.1K | - |
| 17 Oct 2026 17Oct 26 | Run Stephenson County | Orangeville | 21.1K · 10K · 5K | - |
| 18 Oct 2026 18Oct 26 | Endeavor Health Naperville Half Marathon, 10K & 5K | Naperville | 21.1K · 10K · 5K | $45–$100 |
| 24 Oct 2026 24Oct 26 | Run to Pub Fall Marathon Relay | Tinley Park | 42.2K · Relay | - |
| 24 Oct 2026 24Oct 26 | Screaming Pumpkin | Peoria | 42.2K · 21.1K · Relay | - |
| 25 Oct 2026 25Oct 26 | Halloween Run CHICAGO | Illinois | Ultra · 21.1K | - |
| 25 Oct 2026 25Oct 26 | Haunted Halloween Half Marathon & 5km | Chicago | 21.1K · 5K | - |
| 25 Oct 2026 25Oct 26 | Spooky Sprint - Greater Chicago | Shorewood | 21.1K · 10K · 5K | - |
Go a level deeper
Links go down the map, not sideways. Each region and city has its own page of races.
Cities
Common questions
When is the next race in Illinois?
Belleville Main Street Marathon & Half Marathon on September 26, 2026. The table above lists every upcoming race in date order.
Which months are busiest in Illinois?
October (21), November (13), April (9), counting every upcoming race listed in Illinois.
Which distances can I run in Illinois?
The listed races include 22 marathons, 51 half marathons, 24 ultras, 21 10Ks and 26 5Ks. Many events offer more than one distance on the same day.
How do I confirm a race’s details?
Open the race page and check its provenance ledger, which shows where each fact came from. Then confirm the date, price and entry rules with the organizer before you register or book travel.
Spotted something wrong on this page?
Dates and prices move · tell us and we check the organizer’s source