Races Marathon · Chicago, USA
Chicago Marathon
Chicago Marathon is a flat marathon in Chicago, USA, held each October. Pancake-flat grid streets — a course built for even pacing and PBs. October by the lake is typically 5-15C; wind between the buildings is the variable. Flat courses like Chicago's reward metronomic pacing — the danger is going out faster than goal pace because it feels cheap early.
Page rebuilt 2026-10-02 · race facts not independently verified — confirm dates and entries on the official race site
When
October
every year
Course
flat
Marathon
Conditions
October by the lake is typically 5-15C; wind between the buildings is the variable.
Racing this course well
Pancake-flat grid streets — a course built for even pacing and PBs.
Flat courses like Chicago's reward metronomic pacing — the danger is going out faster than goal pace because it feels cheap early.
Pick your goal for Chicago
Pace charts, weekly structure and timelines for the most common marathon goals:
We don’t hold a confirmed date for this edition, so any countdown comes from the date you enter here.
Build your training around Chicago Marathon.
RunV works backwards from race day to today and rearranges the weeks when life interrupts. It does not adapt to this specific course — the pacing guidance above is where the course knowledge is.
Everything above stays free and complete — this is an optional next step, not a paywall.
Asked often
- When is the Chicago Marathon?
- It is held each October in Chicago, USA. Check the official Chicago Marathon site for the exact date and entry windows.
- Is the Chicago Marathon course flat?
- Pancake-flat grid streets — a course built for even pacing and PBs.
- How should I train for the Chicago Marathon?
- Match your preparation to Chicago Marathon's profile and the October weather, then protect consistency — RunV's adaptive plan recalibrates after every run so one bad week never derails the block.
Not sure what to target? Predict your marathon time from a recent race →
More marathon races
Build for Chicago — around your actual life
RunV engineers your block backwards from race day in October — and rebuilds it every time training doesn't go to script.
