Most Improved California Boys 400m Marks Compared to 2025

MileSplit Staff

This content requires a MileSplit Pro plan.
Join Now and select any plan for instant access!

MileSplit Pro
Join Now

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 -16.44 2026 1:06.38 49.94
2 -10.95 2026 1:02.71 51.76
3 -10.74 2026 1:05.71 54.97
4 -10.71 2026 1:04.30 53.59
5 -10.61 2026 1:02.32 51.71
6 -10.16 ...