Readiness
Start with the runner you are today.
Most runners want 14-20 weeks, depending on current base and long-run comfort.
Check readinessChicago, Illinois · Usually October
Build a Chicago Marathon plan that respects heat, wind, and your current base.
Chicago is fast when the day cooperates, but the training block still needs honest mileage, weather-aware workouts, and enough runway for the long run to grow.
Pacing
Weather changes the training target.
Fall race day can feel very different from summer training. Use heat adjustments in the build, then practice effort control for a range of conditions.
Adjust paceCourse
Train the demands, not just the distance.
Treat the flat course as an opportunity, not permission to overreach early. The best Chicago blocks keep threshold work controlled and long runs steady.
Check load01
Confirm the base
Use weekly mileage, long-run comfort, consistency, and current pain signals before choosing a marathon plan.
02
Protect the hard days
If heat, poor sleep, HRV, or load spikes stack up, adjust intensity first instead of forcing the planned split.
03
Keep gear boring
Estimate shoe replacement before peak mileage so race shoes and daily trainers are not surprise decisions.
04
Close the loop
Send workouts to Apple Watch, bring completed runs back, and let the next week respond to what actually happened.
A race plan should adapt before race day.
Treadly builds the week around your goal, then adjusts when recovery, weather, training load, or life changes the inputs.
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