Progress against the field
Between Boston 2025 and Boston 2026, Mari Dalman lost 10:26 to the field.
Over the same races everyone got 6:22 quicker, so 4:04 slower on the clock looks better than it was.
The largest gain on the field came from Las Vegas 2026 → New York 2026: 3:19 in 97 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
-
Boston8 Oct 2026Doubles Open · Women1:28:15 PB283/742Beat 62%
-
Boston8 Oct 2026Individual Open · Women1:48:18344/475Beat 28%
↑ 133 days after New York 2026 1:39 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:16 faster on the clock looks better than it was: the race was 3:55 faster for everyone, which leaves this 1:39 behind the field.
The fieldCompare these two →3:55 faster This athlete2:16 faster -
New York28 May 2026Individual Open · Women1:50:34682/1098Beat 38%
↑ 97 days after Las Vegas 2026 3:19 better than the field Why ↓Close ↑
1:44 faster on the clock in a race that was 1:35 slower for everyone: 3:19 better than the field.
The fieldCompare these two →1:35 slower This athlete1:44 faster -
Las Vegas20 Feb 2026Individual Open · Women1:52:181325/1796Beat 26%
↑ 22 days after Phoenix 2026 11:20 worse than the field Why ↓Close ↑
11:20 behind the field: 10:38 slower on the clock, against 0:42 faster for everyone.
The fieldCompare these two →0:42 faster This athlete10:38 slower -
Phoenix29 Jan 2026Individual Open · Women1:41:40 PB393/631Beat 38%
↑ 76 days after Chicago 2025 0:02 worse than the field Why ↓Close ↑
0:25 faster on the clock, and the race was 0:27 faster for everyone. Whatever changed, it changed for all of them.
The fieldCompare these two →0:27 faster This athlete0:25 faster -
Dallas21 Nov 2025Doubles Open · Women1:34:41941/1529Beat 39%
-
Chicago14 Nov 2025Doubles Open · Women1:39:221163/1539Beat 24%
-
Chicago14 Nov 2025Individual Open · Women1:42:05772/1127Beat 32%
↑ 49 days after Boston 2025 0:44 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:09 faster on the clock looks better than it was: the race was 2:53 faster for everyone, which leaves this 0:44 behind the field.
The fieldCompare these two →2:53 faster This athlete2:09 faster -
Boston26 Sep 2025Individual Open · Women1:44:14854/1290Beat 34%