Most Improved Colorado Boys 400m Marks Compared to 2025

Mar 20, 2026

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Improvement Rankings: Top Colorado Boys 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	-9.63	Chase Comer Mountain Vista High School	2028	1:05.59	55.96
2	-9.25	Jasiah Alvarez Delta High School	2028	1:09.78	1:00.52
3	-7.91	Justin Saglembeni Palmer Ridge High School	2028	1:11.32	1:03.41
4	-7.71	Oliver Garcia-Jolly Westminster High School	2028	1:10.54	1:02.83
5	-7.52	Tallan Clark Arapahoe High School	2028	1:02.59	55.07
6	-6.42	...