Most Improved: Top Girls In 400m Compared To 2024

Apr 08, 2025

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Photo: Dave Tibbetts/Florida MileSplit

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In her first 400m of the 2025 season, the Polytechnic School (Calif.) junior, Mariana Gomez, solidified herself as the top improver in the nation this season. Gomez ran 1:02.58, more than enough to take off 18 seconds from her fastest mark a year ago.

Buford (Ga.) sophomore Olivia Harris Buford ran 52.53 a few weeks ago to take over the top spot on the national leaderboard, but just barely came up short of surpassing her PB of 52.53.

Check out the top improved girls in the 400m this outdoor season compared to a year ago.

BOYS POTW | GIRLS POTW | BOYS INDOOR RANKINGS | GIRLS INDOOR RANKINGS

Top 5,000 Most Improved High School Girls In The 400m Compared To Last Year

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Athlete	2025	2024	Difference
Mariana Gomez - Polytechnic - Pasadena (SS)	1:02.58	1:20.52	( 17.94 )
Olivia Hartman - Bentonville High School	1:01.38	1:15.80	( 14.42 )
Lizzy Greensword - Mansfield	1:01.34	1:15.00	( 13.66 )
Aaliyah Mardis - Huffman High School	59.86	1:12.52	( 12.66 )
Hailee Harper -