Most Improved Seniors: Top Boys 400m Performers in California

MileSplit Staff
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Ranking the Most Improved Class of 2026 Boys 400m performers from California compared to their best results from 2025.

Most Improved - 400 Meter Dash

Comparing 2026 season to 2025 season

Rank Improved Athlete/Team Class 2025 PR 2026 PR
1 -16.88 2026 1:29.00 1:12.12
2 -14.95 2026 1:06.38 51.43
3 -13.80 2026 1:34.27 1:20.47
4 -12.71 2026 1:12.66 59.95
5 -9.91 2026 1:02.32 52.41
6 -7.58