Big Sky Conference, effective after the 1995-96 academic year. 1998 - Brigham Young University–Hawai'i, Central Washington University, Hawai'i Pacific University, Humboldt State University, Saint Martin's University, Western Oregon University, Western New Mexico University and Western Washington University joined the PacWest, effective in the 1998-99 academic year. 1999 - Northwest Nazarene University and Seattle University joined the PacWest, effective in the 1999-2000 academic year. 2001 - Alaska–Anchorage, Alaska–Fairbanks, Central Washington, Humboldt State, Northwest Nazarene, Saint Martin's, Seattle, Seattle Pacific, Western Oregon and Western Washington left the PacWest to form the Great Northwest Athletic Conference (GNAC), effective after the 2000-01 academic year. 2005 - Montana State–Billings and Western New Mexico left the PacWest to join the Heartland Conference, effective after the 2004-05 academic year. 2005 - Notre Dame de Namur University joined the PacWest as a provisional full member (along with Grand Canyon re-joining), effective in the 2005-06 academic year. 2007 - Dixie State University joined the PacWest, effective in the 2007-08 academic year. 2009 - Academy of Art University and Dominican University of California joined the PacWest, effective in the 2009-10 academic year. 2011 - California Baptist University (Cal Baptist) joined the PacWest, effective in the 2011-12 academic year. 2012 - Azusa Pacific University, Fresno Pacific University, Holy Names University and Point Loma Nazarene University joined the PacWest, effective in the 2012-13 academic year. 2013 - Grand Canyon left the PacWest to join the NCAA Division I ranks and the Western Athletic Conference (WAC), effective after the 2012-13 academic year. 2013 - Sonoma State University joined the PacWest as an affiliate member for men's and women's tennis, effective in the 2014 spring season (2013-14 academic year). 2014 - California State University, Los Angeles and California State University, Stanislaus joined the PacWest as affiliate members for women's tennis, effective in the 2014 spring season (2013-14 academic year). 2015 - Concordia University Irvine joined the PacWest, effective in the 2015-16 academic year. 2017 - BYU–Hawaii left the PacWest as the school announced that it would discontinue its athletic program, effective after the 2016-17 academic year. 2017 - Biola University joined the PacWest, effective in the 2017-18 academic year. 2018 - Two institutions left the PacWest to join their respective new home primary conferences: Dixie State to join the Rocky Mountain Athletic Conference (RMAC), and Cal Baptist to join the NCAA Division I ranks and the WAC, both effective after the 2017-18 academic year.