All-time top 20
| Place | Name | Year | Time |
| 1 | Kimberly Zepeda | 2016 | 19:07.5 |
| 2 | Kalli McCann | 2011 | 19:40.0 |
| 3 | Tressa Miller | 2009 | 20:17.0 |
| 4 | Christy Stevens | 2011 | 20:36.0 |
| 5 | Heather Jessen | 2018 | 20:36.6 |
| 6 | Jennifer Schaefer | 1996 | 20:44.0 |
| 7 | Christina Stopak | 2017 | 20:53.8 |
| 8 | Alyssa Proffitt | 2016 | 21:09.7 |
| 9 | Delaney Turner | 2011 | 21:25.0 |
| 10 | Kellie DeJong | 2009 | 21:48.0 |
| 11 | Regina Hafner | 2012 | 21:51.6 |
| 12 | Kendra Schuldeis | 2007 | 21:57.5 |
| 13 | Sarah McKeon | 2013 | 22:12.5 |
| 14 | Chelsi Palmer | 2010 | 22:17.0 |
| 15 | Sarah Sneed | 2011 | 22:26.0 |
| 16 | Jessica Beatty | 2017 | 22:33.3 |
| 17 | Danielle Costain | 2019 | 22:36.7 |
| 18 | Hannah Murphy | 2013 | 22:40.6 |
| 19 | Charley Buddenhagen | 2014 | 22:42.0 |
| 20 | Shiomi Kuwabara | 2015 | 22:49.8 |