Most Improved Iowa Girls 400m Marks Compared to 2025

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Improvement Rankings: Top Iowa Girls 400m marks compared to their season’s best performances from 2025.

Most Improved - 400 Meter Dash

Comparing 2026 season to 2025 season

Rank Improved Athlete/Team Class 2025 PR 2026 PR
1 -13.63 2028 1:27.32 1:13.69
2 -13.27 2027 1:24.64 1:11.37
3 -12.91 2028 1:35.16 1:22.25
4 -12.00 2028 1:45.12 1:33.12
5 -10.38 2027 1:28.71 1:18.33
6 -10.10 ...