| Institution | Location | Founded | Nickname | Joined | Previous conference | Left | Conference joined | Current conference |
| Central Washington University | Ellensburg, Washington | 1891 | Wildcats | 1984 | Evergreen | 1998 | PWC | [Great Northwest Conference|Northwest Athletic Conference|Great Northwest] |
| Lewis–Clark State College | Lewiston, Idaho | 1893 | Warriors | 1984 | Evergreen | 1998 | Frontier | Cascade |
| Pacific Lutheran University | Tacoma, Washington | 1890 | Lutes | 1984 | Northwest | 1986 | Northwest | Northwest |
| Saint Martin's University | Lacey, Washington | 1895 | Saints | 1984 | Evergreen | 1998 | PWC | Great Northwest |
| Seattle University | Seattle, Washington | 1891 | Redhawks | 1984 | Evergreen | 1996 | Northwest | WAC |
| Simon Fraser University | Burnaby, British Columbia | 1965 | Clan | 1984 | Evergreen | 1998 | Independents | Great Northwest |
| Western Washington University | Bellingham, Washington | 1893 | Vikings | 1984 | Evergreen | 1998 | PWC | Great Northwest |
| Whitman College | Walla Walla, Washington | 1859 | Missionaries | 1984 | Evergreen Northwest | 1986 | Northwest | Northwest |
| Whitworth University | Spokane, Washington | 1890 | Pirates | 1984 | Evergreen | 1988 | Northwest | Northwest |
| University of Alaska Southeast | Juneau, Alaska | 1972 | Humpback Whales | 1986 | Independents | 1990 | none | dropped sports 1990 |
| Sheldon Jackson College | Sitka, Alaska | 1896 | Golden Seals | 1986 | Independents | 1992 | dropped sports | closed 2007 |
| Northwest University | Kirkland, Washington | 1934 | Eagles | 1987 | Independents | 1990 | Independents | Cascade |
| University of Puget Sound | Tacoma, Washington | 1888 | Loggers | 1989 | PWC | 1996 | Northwest | Northwest |
| The Evergreen State College | Olympia, Washington | 1967 | Geoducks | 1996 | Independents | 1998 | Independents | Cascade |