| Meeting | Date | Location |
| 1 | March 29, 1959 | Lake Arrowhead, California |
| 2 | February 29, 1960 | Berkeley, California |
| 3 | February 27, 1961 | Phoenix, Arizona |
| 4 | March 5, 1962 | San Diego, California |
| 5 | February 25, 1963 | Reno, Nevada |
| 6 | February 26, 1964 | Albuquerque, New Mexico |
| 7 | March 2, 1965 | San Francisco, California |
| 8 | February 28, 1966 | Tucson, Arizona |
| 9 | March 6, 1967 | Honolulu, Hawaii |
| 10 | March 4-6, 1968 | Denver, Colorado |
| 11 | March 2-4, 1969 | Las Vegas, Nevada |
| 12 | March 1-3, 1970 | Seattle, Washington |
| 13 | Feb 28-Mar 2, 1971 | Newport Beach California |
| 14 | March 5-7, 1972 | Tempe, Arizona |
| 15 | March 4-6, 1973 | San Diego, California |
| 16 | March 3-5, 1974 | Victoria, British Columbia |
| 17 | March 3-6, 1975 | Honolulu, Hawaii |
| 18 | March 7-9, 1976 | Monterey, California |
| 19 | March 6-8, 1977 | Albuquerque, New Mexico |
| 20 | March 4-6, 1978 | Santa Barbara, California |
| 21 | March 4-6, 1979 | Colorado Springs, Colorado |
| 22 | March 2-4, 1980 | Seattle, Washington |
| 23 | March 8-10, 1981 | San Francisco, California |
| 24 | March 7-9, 1982 | Las Cruces, New Mexico |
| 25 | March 6-8, 1983 | Portland, Oregon |
| 26 | March 4-6, 1984 | Monterey, California |
| 27 | March 7-9, 1985 | Honolulu, Hawaii |
| 28 | March 6-8, 1986 | Vancouver, British Columbia |
| 29 | March 5-7, 1987 | Los Angeles, California |
| 30 | March 6-8, 1988 | Reno, Nevada |
| 31 | March 4-6, 1989 | Banff, Canada |
| 32 | March 16-18, 1990 | Tempe, Arizona |
| 33 | March 1-3, 1991 | San Diego, California |
| 34 | March 12-14, 1992 | Salt Lake City, Utah |
| 35 | March 11-13, 1993 | Honolulu, Hawaii |
| 36 | March 10-13, 1994 | Eugene, Oregon |
| 37 | March 17-19, 1995 | Jackson Hole, Wyoming |
| 38 | March 15-17, 1996 | Vancouver, British Columbia |
| 39 | March 14-17, 1997 | Marina del Rey, California |
| 40 | March 11-13, 1998 | Salt Lake City, Utah |
| 41 | March 12-14, 1999 | Boulder, Colorado |
| 42 | March 15-17, 2000 | Las Cruces, New Mexico |
| 43 | March 2-4, 2001 | Los Angeles, California |
| 44 | March 1-3, 2002 | Seattle, Washington |
| 45 | March 14-16, 2003 | Salt Lake City, Utah |
| 46 | March 5-7, 2004 | Phoenix, Arizona |
| 47 | March 31-April 2, 2005 | Sun Valley, Idaho |
| 48 | March 10-12, 2006 | Santa Rosa, California |
| 49 | March 16-18, 2007 | Portland, Oregon |
| 50 | March 7-9, 2008 | Denver, Colorado |
| 51 | March 6-8, 2009 | Las Cruces, New Mexico |
| 52 | March 25-27, 2010 | Coeur d’Alene, Idaho |
| 53 | March 14-17, 2011 | San Diego, California |
| 54 | March 17-21, 2012 | Ft. Collins, Colorado |
| 55 | March 24-30, 2013 | Tucson, Arizona |
| 56 | March 30-April 2, 2014 | Fargo, North Dakota |
| 57 | March 8-11, 2015 | Anchorage, Alaska |
| 58 | Marth 20-23, 2016 | Socorro, New Mexico |
| 59 | March 19-22, 2017 | Seattle, Washington |
| 60 | March 18-21, 2018 | Las Vegas, Nevada |
