Progress against the field
From Chicago 2023 to Chicago Navy Pier 2024, Courtney Hafeman got 1:09 faster than the field.
The clock says 2:39 faster, but the races themselves got 1:30 quicker for everyone.
How this is worked out ⓘ
A finish time moves for two reasons: the athlete, and the race — its course, its floor, its day. For each pair of races in a row in one category, we take everyone who raced both and use the middle of how much they moved (the median) as "the race". Whatever is left is the athlete. Doubles are compared only when the same two people raced both, and told as the pair's; relays are left out. A pair with fewer than 15 athletes in common is not shown.
Every race
3 races · 3 events
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Chicago14 Nov 2025Doubles Open · Mixed1:18:27 PB349/1179Beat 70%
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Chicago Navy Pier16 Nov 2024Individual Open · Women1:34:00 PB312/599Beat 48%
↑ 371 days after Chicago 2023 1:09 better than the field Why ↓Close ↑
2:39 faster on the clock, and the race was 1:30 faster for everyone, so 1:09 of it was this athlete.
The fieldCompare these two →1:30 faster This athlete2:39 faster -
Chicago11 Nov 2023Individual Open · Women1:36:39180/299Beat 40%