Most Improved Idaho Boys 400m Marks Compared to 2025

May 29, 2026

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

Comparing 2026 season to 2025 season

Rank	Improved	Athlete/Team	Class	2025 PR	2026 PR
1	-12.39	Tryson Gundersen Shelley High School	2027	1:14.82	1:02.43
2	-10.01	Thomas Anderson Blackfoot High School	2026	1:01.54	51.53
3	-8.99	Blake Swain Columbia High School	2028	1:06.45	57.46
4	-8.49	Riley Jordan Centennial High School	2027	1:10.85	1:02.36
5	-8.32	Gabe Haas Mullan High School	2028	1:20.87	1:12.55
6	-7.34	Hayden Checket...