Training start dates for Chicago 2027
| Plan | Week 1 starts | Peak week (3-week taper) | Taper starts |
|---|---|---|---|
| 12 weeks | Mon 19 Jul 2027 | Mon 13 Sep 2027 | Mon 20 Sep 2027 |
| 14 weeks | Mon 5 Jul 2027 | Mon 13 Sep 2027 | Mon 20 Sep 2027 |
| 16 weeks | Mon 21 Jun 2027 | Mon 13 Sep 2027 | Mon 20 Sep 2027 |
| 18 weeks | Mon 7 Jun 2027 | Mon 13 Sep 2027 | Mon 20 Sep 2027 |
| 20 weeks | Mon 24 May 2027 | Mon 13 Sep 2027 | Mon 20 Sep 2027 |
| 24 weeks | Mon 26 Apr 2027 | Mon 13 Sep 2027 | Mon 20 Sep 2027 |
Week 1 starts on a Monday so race day falls at the end of the final week (for a Monday race such as Boston, on the day after it).
Qualifying for Chicago
Runners who meet the standard can apply through the time-qualifier process during the application window. Only full-marathon results on a certified course count, and no allowance is made for weather or course conditions. See the full Chicago qualifying standards for your age group.
Other majors
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Build a custom calendar with the training start date calculator and set paces with the Pfitzinger or Hansons calculators.
Last reviewed: October 2026 · Health disclaimer