Most Improved South Dakota Girls 400m Marks Compared to 2025

Apr 10, 2026

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Improvement Rankings: Top South Dakota 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	-9.14	Olivia Hanson Viborg High School	2027	1:24.65	1:15.51
2	-6.38	Hannah Masterson Scotland High School	2028	1:24.03	1:17.65
3	-5.45	Iris Birnbaum Rapid City Stevens High School	2029	1:08.68	1:03.23
4	-5.16	Kelsey Barthel Elkton/Lake Benton High School	2029	1:29.21	1:24.05
5	-5.12	Kate Bouman Baltic School District	2026	1:10.02	1:04.90
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