Most Improved California Boys 400m Marks Compared to 2025

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Improvement Rankings: Top California Boys 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 -14.98 2026 1:06.38 51.40
2 -10.61 2026 1:02.32 51.71
3 -10.16 2027 1:04.88 54.72
4 -9.64 2027 1:01.13 51.49
5 -9.59 2027 1:02.13 52.54
5 -9.59 ...