| Name | Time | Date | Meet |
|---|---|---|---|
| Kaia Grobe | 49.97 | Nov. 17, 2012 | 2012-13 Minnesota Girls State High School Championships |
| Kaia Grobe | 50.18 | Nov. 15, 2011 | 2011-12 Minnesota Girls A Championships |
| Kaia Grobe | 52.60 | Nov. 16, 2010 | 2011 Minnesota Girls High School Best Times |
