Most Improved South Dakota Girls 400m Marks Compared to 2025

May 29, 2026

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

MileSplit Pro Join Now

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	-12.11	Justice Sovell Sully Buttes High School	2030	1:24.94	1:12.83
2	-9.89	Iris Birnbaum Rapid City Stevens High School	2029	1:08.68	58.79
3	-9.69	Josie Sovell Sully Buttes High School	2030	1:21.01	1:11.32
4	-9.14	Olivia Hanson Viborg High School	2027	1:24.65	1:15.51
5	-8.99	Mayzie McDaniel Philip High School	2029	1:12.25	1:03.26
6	-8.90