BestRacesroad · Marathon
Chicago Marathon
| Distances | Marathon |
| Surface | road |
| Field size | 54,382 runners |
| Founded | 1977 (49 years) |
| Elevation gain | 243 ft |
| USATF certified | Yes |
| Boston qualifier | Yes |
Researched from the race's own site and published results, last updated October 4, 2026.
The 2026 edition has been run. The organizer hasn't announced the next date yet. This page updates automatically when they do — the address stays the same, so a bookmark or link keeps working.
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Race-day weather
What the weather did on October 11 in each of the last 5 years, measured at Chicago Northerly Island, 1.9 miles from Chicago.
| Year | High | Low | Rain |
|---|---|---|---|
| 2025 | 65°F | 58°F | — |
| 2024 | 82°F | 57°F | — |
| 2023 | 64°F | 46°F | — |
| 2022 | 67°F | 54°F | — |
| 2021 | 79°F | 61°F | — |
Daily highs and lows, not start-line temperatures: most races start in the cool of the morning, closer to the low. Source: NOAA National Centers for Environmental Information, GHCN-Daily.
You'll be staying with other racers
That's about 177 runners for every hotel, motel and guest house within 15 miles of the race. Race weekend goes to whoever books first.
Lodging count from OpenStreetMap, within 15 miles of the race start we have on file.
Bookings made through this map may earn BestRaces a commission. It has no effect on rankings (how ranking works).
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