Most Improved California Girls 400m Marks Compared to 2025

May 29, 2026

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Improvement Rankings: Top California 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	-18.70	Niirayah Vaughn Colony (SS)	2028	1:25.99	1:07.29
2	-17.71	YeJin Moon Davis (SJ)	2027	1:25.10	1:07.39
3	-14.37	Jazmine Calderon Banda Sierra (SJ)	2027	1:22.76	1:08.39
4	-14.36	Lillian Rogers Alta Loma (SS)	2028	1:23.85	1:09.49
5	-13.60	Jah'niece Morgan Rodriguez (Angelo) (SJ)	2028	1:19.28	1:05.68
6	-13.59	Isis Nunez ...