Chicago Marathon

Assembled from 36 blocks · 3 evidence · 38 related

1. Story
2. First run on 25 September 1977 as the Mayor Daley Marathon, named for Richard J. Daley, who had backed the idea and died in office the previous December. More than 4,000 runners started, a very large field for the period, and the race was won by Dan Cloeter in 2:17:52 and Dorothy Doolittle in 2:50:47. The course is a loop that starts and finishes in Grant Park and covers a flat lakeside city on a grid, with almost no gradient and a start-finish separation of essentially zero, so it satisfies both record-eligibility criteria with enormous margin. It is where Kelvin Kiptum ran 2:00:35 on 8 October 2023 and where Ruth Chepngetich ran 2:09:56 on 13 October 2024. Its weakness is the calendar: an early-October date in a continental climate makes it the Major most exposed to a hot year.
3. Knowledge
4. Chicago Marathon
5. Chicago
6. Abbott World Marathon Majors
7. Connections
8. The temperature penalty in marathon running
9. Berlin Marathon
10. Chicago
11. Abbott World Marathon Majors
12. The first Chicago Marathon, as the Mayor Daley Marathon
13. The World Marathon Majors series is announced
14. Kelvin Kiptum runs 2:00:35 in Chicago
15. Ruth Chepngetich runs 2:09:56 in Chicago
16. Home Insurance Building, Chicago
17. The Home Insurance Building is completed in Chicago
18. Chicago Marathon
19. The first Chicago Marathon, as the Mayor Daley Marathon
20. The Great Migration
21. The Great Migration
22. Boston Marathon
23. London Marathon
24. Berlin Marathon
25. Chicago Marathon
26. New York City Marathon
27. Tokyo Marathon
28. The World Marathon Majors series is announced
29. Tokyo becomes the sixth Major
30. Sydney runs its first race as the seventh Major
31. Cape Town is confirmed as the eighth Major
32. Cape Town scheduled to run as a Major
33. Evidence
34. The Chicago Marathon was founded on 25 September 1977 as the Mayor Daley Marathon, drew more than 4,000 runners, and was won by Dan Cloeter in 2:17:52 and Dorothy Doolittle in 2:50:47. V55 verification basis: worldathletics.org was refused by this session's egress proxy; read only through an attributed search summary.
35. Kelvin Kiptum ran 2:00:35 at the Chicago Marathon on 8 October 2023, improving Eliud Kipchoge's 2:01:09 set in Berlin, and the mark was subsequently ratified. V55 verification basis: worldathletics.org was refused by this session's egress proxy; read only through attributed search summaries.
36. Ruth Chepngetich, who ran 2:09:56 at Chicago on 13 October 2024, was provisionally suspended in 2025 after testing positive for hydrochlorothiazide and received a three-year ban, reduced from four on admission; her prior results including the world record were reported as remaining valid. V55 verification basis: the AIU decision document itself was not retrieved; this rests on consistent reporting by ESPN, Athletics Weekly and the BBC.