Time | Date | Name | Team | Meet |
---|---|---|---|---|
46.89 | Feb. 10, 2023 | Lance Swanepoel | Ankeny Senior High School | IHSAA Boys State Championships |
47.84 | Feb. 7, 2014 | Robert Hemmingsen | Lewis Central High School | 14 Iowa State Championships - Boys |
49.73 | Feb. 13, 2010 | Dustin Rhoads | Ames Senior High School | 10 Iowa Boys State Championships |
50.67 | Feb. 14, 2009 | Mitchell Taylor | Johnston High School | IHSAA State Championship |