Most Improved Colorado Boys 400m Marks Compared to 2025

May 22, 2026

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

Comparing 2026 season to 2025 season

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Rank	Improved	Athlete/Team	Class	2025 PR	2026 PR
1	-17.60	Dylen Hofferber Fort Lupton High School	2027	1:17.58	59.98
2	-16.45	Nick Clark Soroco High School	2026	1:14.37	57.92
3	-15.36	Tanner Ziek Central Grand Junction High School	2028	1:18.62	1:03.26
4	-15.06	Gage Nielsen Rangely High School	2026	1:23.42	1:08.36
5	-13.78	Joshua Martinez Greeley Central High School	2026	1:18.45	1:04.67
6	-12.95