Most Improved Illinois Girls 400m Marks Compared to 2025

May 29, 2026

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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	-39.27	Sasha Betz Quincy (Sr.)	2027	2:58.39	2:19.12
2	-28.61	Aviana White Oak Park (O.P.-River Forest)	2028	1:37.87	1:09.26
3	-16.90	Madisun McCullough Palestine (Co-Op)	2029	1:38.74	1:21.84
4	-15.11	Samantha Niebla Romeoville	2028	1:33.62	1:18.51
5	-13.03	Necole Campbell Chicago Heights (Bloom Twp.)	2028	1:20.07	1:07.04
6	-12.85