Most Improved Illinois Girls 400m Marks Compared to 2025

May 22, 2026

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Improvement Rankings: Top Illinois Girls 400m marks compared to their season’s best performances from 2025.

Comparing 2026 season to 2025 season

...

Rank	Improved	Athlete/Team	Class	2025 PR	2026 PR
1	-28.61	Aviana White Oak Park (O.P.-River Forest)	2028	1:37.87	1:09.26
2	-16.90	Madisun McCullough Palestine (Co-Op)	2029	1:38.74	1:21.84
3	-15.11	Samantha Niebla Romeoville	2028	1:33.62	1:18.51
4	-13.03	Necole Campbell Chicago Heights (Bloom Twp.)	2028	1:20.07	1:07.04
5	-12.85	Braelyn Sonnemaker Petersburg (PORTA)	2027	1:25.99	1:13.14
6	-12.49