Sunday, October 11, 2026 - Flat World Marathon Major with PB potential
Chicago Marathon Training Plan
Chicago is fast when you are patient. Build marathon durability, protect the early miles, and adapt your plan as your fitness changes.
Sunday, October 11, 2026 - Flat World Marathon Major with PB potential
Chicago is fast when you are patient. Build marathon durability, protect the early miles, and adapt your plan as your fitness changes.
Race date
Sunday, October 11, 2026
Distance
marathon
Location
Chicago, United States
Training window
A 16-week build starts around June 21, 2026, with peak long runs landing in September.
Chicago is a clear PB target for many runners because the course is flat and the crowds make the middle miles feel easier than they are.
That creates the main risk: the first half can feel too good. Your training should teach marathon pace discipline before the race teaches it the hard way.
RunRight uses Apple Watch history to keep the plan realistic, adjusting the next workout when you overperform, miss training, or need more recovery.
Course profile: Flat city course through many neighbourhoods, with crowd energy that can pull runners out too quickly.
Race-day conditions: October conditions can vary. Train with both pace and effort so you can adjust if race day is warmer or windier than expected.
Race date source: Bank of America Chicago Marathon.
| Goal | Pace min/km | Pace min/mi | Peak weekly volume | Training focus |
|---|---|---|---|---|
| Sub 3:00 | 4:16/km | 6:52/mi | 65-90 km | High aerobic volume, threshold work, and long runs with controlled marathon-pace blocks. |
| Sub 3:30 | 4:59/km | 8:01/mi | 50-70 km | Consistent long runs, tempo sessions, and enough easy volume to absorb quality work. |
| Sub 4:00 | 5:41/km | 9:09/mi | 40-60 km | Durable aerobic base, steady marathon pace, and conservative progression. |
| Finish strong | 6:15-7:00/km | 10:03-11:16/mi | 25-45 km | Safe build-up, run-walk or easy long-run progression, and injury-resistant consistency. |
Practice even splits and avoid early surges so your race plan survives past 30 km.
Use effort and heart rate alongside pace so a warm or windy race day does not break the plan.
Chicago rewards consistency. Avoid panic mileage in September and use adaptive progression instead.
RunRight reads recent runs, long-run durability, pace trends, heart rate, and VO2Max signals from Apple Health to estimate what you can handle now.
Miss a run, overperform, or fade in a workout, and RunRight adjusts the next sessions instead of forcing a static PDF plan.
Download RunRight, connect Apple Health, and get a race plan that adapts to your actual training before Sunday, October 11, 2026.
Try RunRight for freeThe 2026 Bank of America Chicago Marathon is scheduled for Sunday, October 11, 2026.
Most runners should target even splits or a slight negative split. The flat course is fast, but early excitement can lead to late-race fading.
Yes. RunRight recalculates workouts from your actual Apple Watch training history, so missed runs or unexpectedly strong sessions can change future training.
Download RunRight free and start training smarter today.