NWNPC has put on conventions annually since 1957. Read about the past conventions.
| 2011 - 56th - Vancouver, BC | |
| 2009 - 53rd - Seattle, WA | 2010 - 54th - Portland, OR |
| 2007 - 51st - Portland, OR | 2008 - 52nd - Vancouver, BC |
| 2005 - 49th - Vancouver, BC | 2006 - 50th - Tacoma, WA |
