Event Note:
| % | Championship | 54.46 | Helen Crofts | Simon Fraser | 2013 |
| # | GNAC | 53.56 | Mary Pearce | Alaska Anchorage | 2007 |
| $ | McArthur Field | 55.10 | Mary Pearce | Alaska Anchorage | 2006 |
| Lane | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|
| 1 | Sytsma, Emily | SO | Western Washington | 58.83 |
| 2 | Hamre, Grace | FR | Saint Martin's | 58.14 |
| 3 | Bezanson, Hayley | SR | Alaska Anchorage | 57.63 |
| 4 | Desch, Chantel | SR | Simon Fraser | 56.08 |
| 5 | Aniteye, Vanessa | FR | Alaska Anchorage | 56.13 |
| 6 | Taylor, Lani | FR | Seattle Pacific | 56.25 |
| 7 | Dodd, Sophie | JR | Simon Fraser | 58.02 |
| 8 | Smith, Savannah | SO | Western Washington | 58.44 |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 2 | Inderbitzin, Julia | SO | Central Washington | 58.02 | 58.02 2017 Ken Shannon Invitational |
| 3 | Taylor, Lani | FR | Seattle Pacific | 55.84 | 55.84 Beach Invitational |
| 4 | Bezanson, Hayley | SR | Alaska Anchorage | 57.34 | 57.34 2017 Triton Invitational |
| 5 | Hamre, Grace | FR | Saint Martin's | 57.00 | 57.00 CWU Spike Arlt Inv |
| 6 | Desch, Chantel | SR | Simon Fraser | 55.16 | 55.16 2017 Triton Invitational |
| 7 | Conley, McKenna | SO | Northwest Nazarene | 58.54 | 58.54 NNU Invitational |
| 8 | Bailly, Kaitlyn | FR | Concordia (Ore.) | 1:05.31 | 1:05.31 Linfield Open |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 2 | Hong, Cheryl | SR | Seattle Pacific | 56.67 | 56.67 Sacramento State Hornet Invitational |
| 3 | Sytsma, Emily | SO | Western Washington | 57.80 | 57.80 2017 Ralph Vernacchia Track & Field Meet |
| 4 | Aniteye, Vanessa | FR | Alaska Anchorage | 55.11 | 55.11 Beach Invitational |
| 5 | Dodd, Sophie | JR | Simon Fraser | 56.31 | 56.31 2017 Achilles Cup |
| 6 | Gabriel, Olivia | FR | Seattle Pacific | 58.85 | 58.85 CWU Spike Arlt Inv |
| 7 | Lindsay, Nicole | FR | Simon Fraser | 58.65 | 58.65 Bryan Clay Invite |
| 8 | Smith, Savannah | SO | Western Washington | 57.56 | 57.56 2017 Ralph Vernacchia Track & Field Meet |