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| Year | Athlete | School | Time |
| 2022 | Darby Downham | Cheyenne South | 1:01.48 |
| 2021 | Caydince Groth | Cheyenne South | 1:00.68 |
| 2020 | Jordan Stoddard | Cheyenne Central | 59.99 |
| 2019 | Emmy Johnson | Laramie | 58.56 |
| 2018 | Kelly Moodry | Sheridan | 57.60 |
| 2017 | Kelly Moodry | Campbell County | 58.22 |
| 2016 | Ashlyn Erisman | Campbell County | 1:00.45 |
| 2015 | Phoenix Farnham | Laramie | 59.93 |
| 2014 | Mesa Weidle | Rock Springs | 59.23 |
| 2013 | Cassidy Meade | Laramie | 58.98 |
| 2012 | Mandi Anderson | Evanston | 1:00.55 |
| 2011 | Bailey Saxton | Laramie | 1:00.87 |
| 2010 | Audrey West | Star Valley | 59.17 |
| 2009 | Audrey West | Star Valley | 1:00.63 |
| 2008 | Audrey West | Star Valley | 59.84 |
| 2007 | Veronica Elseroad-Wall | Kelly Walsh | 59.12 |
| 2006 | Stacy Slight | Cody | 1:00.1 |