Progress against the field
Between Washington DC 2026 and Boston 2026, Briana Castro pulled 0:22 ahead of the field.
Over the same races everyone got 0:37 quicker, so 0:59 faster on the clock looks better than it was.
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 · 2 events
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Boston8 Oct 2026Doubles Open · Women2:03:21 PB710/742Beat 4%
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Boston8 Oct 2026Individual Open · Women1:30:56 PB178/475Beat 63%
↑ 35 days after Washington DC 2026 0:22 better than the field Why ↓Close ↑
0:22 better than the field: 0:59 faster on the clock, against 0:37 faster for everyone.
The fieldCompare these two →0:37 faster This athlete0:59 faster -
Washington DC3 Sep 2026Individual Open · Women1:31:55246/774Beat 68%