Most Improved Illinois Girls 400m Marks Compared to 2025

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Improvement Rankings: Top Illinois 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 -14.63 2029 1:38.74 1:24.11
2 -9.86 2028 1:19.00 1:09.14
3 -7.17 2029 1:12.55 1:05.38
4 -6.84 2029 1:22.30 1:15.46
5 -6.13 2028 1:17.93 1:11.80
6 -6.10 ...