Progress against the field
Between Boston 2025 and Boston 2026, LIZ YAMAMOTO kept pace with the field.
Over the same races everyone got 8:35 quicker, so 8:25 faster on the clock looks better than it was.
The biggest step was Boston 2025 → Chicago 2025: 4:16 on the field in 49 days.
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
9 races · 7 events
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Boston8 Oct 2026Individual Open · Women1:35:18 PB285/722Beat 61%
↑ 35 days after Washington DC 2026 0:58 better than the field Why ↓Close ↑
1:35 faster on the clock, and the race was 0:37 faster for everyone, so 0:58 of it was this athlete.
The fieldCompare these two →0:37 faster This athlete1:35 faster -
Washington DC3 Sep 2026Doubles Open · Women1:30:48 PB244/706Beat 65%
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Washington DC3 Sep 2026Individual Open · Women1:36:53319/774Beat 59%
↑ 98 days after New York 2026 0:33 better than the field Why ↓Close ↑
6:17 faster on the clock, and the race was 5:44 faster for everyone, so 0:33 of it was this athlete.
The fieldCompare these two →5:44 faster This athlete6:17 faster -
New York28 May 2026Individual Open · Women1:43:10232/516Beat 55%
↑ 119 days after Phoenix 2026 1:43 worse than the field Why ↓Close ↑
2:49 slower on the clock in a race that was 1:06 slower for everyone: 1:43 lost to the field.
The fieldCompare these two →1:06 slower This athlete2:49 slower -
New York28 May 2026Individual Open · Women1:39:08257/586Beat 56%
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Phoenix29 Jan 2026Individual Open · Women1:40:21334/550Beat 39%
↑ 76 days after Chicago 2025 4:14 worse than the field Why ↓Close ↑
4:14 behind the field: 3:47 slower on the clock, against 0:27 faster for everyone.
The fieldCompare these two →0:27 faster This athlete3:47 slower -
Chicago14 Nov 2025Individual Open · Women1:36:34643/1127Beat 43%
↑ 49 days after Boston 2025 4:16 better than the field Why ↓Close ↑
4:16 better than the field: 7:09 faster on the clock, against 2:53 faster for everyone.
The fieldCompare these two →2:53 faster This athlete7:09 faster -
Boston26 Sep 2025Individual Open · Women1:43:43842/1290Beat 35%
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New York30 May 2025Doubles Open · Women1:31:12242/417Beat 42%