| 57 | 2025 | Nov. 19-23 | Cuatro Ciénegas, Coahuila, México | Dean Hendrickson |
| 56 | 2024 | Nov. 20-24 | Grand Junction, CO | Melissa Trammel & David Speas |
| 55 | 2023 | Nov. 15-19 | Bishop, CA | Phil Pister & Michael Bogan |
| 54 | 2022 | Nov. 16-19 | St. George, UT | Krissy Wilson & Richard Fridell |
| 53 | 2021 | Nov. 17-21 | Virtual Meeting | Krissy Wilson |
| 52 | 2020 | Nov. 18-22 | No formal meeting, due to COVID-19 | Krissy Wilson |
| 51 | 2019 | Nov. 20-24 | Alpine, Texas, United States of America | Megan Bean |
| 50 | 2018 | Nov. 14-18 | Death Valley, California, United States of America | Phil Pister |
| 49 | 2017 | Nov. 15-19 | San Luis Rio Colorado, Sonora, México | Martha Román |
| 48 | 2016 | Nov. 17-21 | Albuquerque, New Mexico, United States of America | David Propst |
| 47 | 2015 | Nov. 18-22 | Death Valley, California, United States of America | Phil Pister |
| 46 | 2014 | Nov. 19-23 | San José del Cabo, Baja California Sur, México | Francisco Garcia de León |
| 45 | 2013 | Nov. 20-24 | Flagstaff, Arizona, United States of America | Linn Montgomery |
| 44 | 2012 | Nov. 14-18 | Death Valley, California, United States of America | Phil Pister |
| 43 | 2011 | Nov. 8-11 | Hermosillo, Sonora, México | Alejandro Varela Romero |
| 42 | 2010 | Nov. 18-21 | Moab, Utah, United States of America | Krissy Wilson |
| 41 | 2009 | Nov. 18-22 | Death Valley, California, United States of America | Phil Pister |
| 40 | 2008 | Nov. 12-16 | Cuatro Ciénegas, Coahuila, México | Cristina Vélez & Dean Hendrickson |
| 39 | 2007 | Nov. 14-18 | Ventura, California, United States of America | Steve Norris |
| 38 | 2006 | Nov. 15-19 | Death Valley, California, United States of America | Phil Pister |
| 37 | 2005 | Nov. 16-20 | Cuatro Ciénegas, Coahuila, México | Dean Hendrickson |
| 36 | 2004 | Nov. 11-14 | Tucson, Arizona, United States of America | Scott Bonar |
| 35 | 2003 | Nov. 20-23 | Death Valley, California, United States of America | Phil Pister |
| 34 | 2002 | Nov. 14-17 | San Luis Potosí, SLP, México | Juan Miguel Artigas Azas |
| 33 | 2001 | Nov. 15-18 | Alpine, Texas, United States of America | Nathan Allan |
| 32 | 2000 | Nov. 16-19 | Death Valley, California, United States of America | Phil Pister |
| 31 | 1999 | Nov. 18-21 | Ciudad Victoria, Tamaulipas, México | Francisco Garcia de León |
| 30 | 1998 | Nov. 12-15 | Page, Arizona, United States of America | Leo Lentsch |
| 29 | 1997 | Nov. 20-23 | Death Valley, California, United States of America | Phil Pister |
| 28 | 1996 | Nov. 6-9 | La Paz, Baja California Sur, México | Francisco Reynoso M. |
| 27 | 1995 | Nov. 16-19 | Reno, Nevada, United States of America | Glenn Clemmer & Randy NcNatt |
| 26 | 1994 | Nov. 17-20 | Death Valley, California, United States of America | Phil Pister |
| 25 | 1993 | Nov. 10-14 | Monterrey, Nuevo León, México | Salvador Contreras Balderas |
| 24 | 1992 | Nov. 18-21 | Mesa, Arizona, United States of America | Paul Marsh & W.L. Minckley |
| 23 | 1991 | Nov. 21-23 | Death Valley, California, United States of America | Phil Pister |
| 22 | 1990 | Nov. 14-17 | Ensenada, Baja California Norte, México | Gorgonio Ruiz & Carlos Yruretagoyena |
| 21 | 1989 | Nov. 16-18 | Albuquerque, New Mexico, United States of America | Steve Platania |
| 20 | 1988 | Nov. 16-19 | Death Valley, California, United States of America | Phil Pister |
| 19 | 1987 | Nov. 12-14 | Hermosillo, Sonora, México | Lourdes Juárez |
| 18 | 1986 | Nov. 20-22 | St. George, Utah, United States of America | Charles Pregler |
| 17 | 1985 | Nov. 14-16 | Death Valley, California, United States of America | Phil Pister |
| 16 | 1984 | Nov. 14-17 | San Luis Potosí, SLP, México | Nicolas Vázquez |
| 15 | 1983 | Nov. 17-19 | Death Valley, California, United States of America | Phil Pister |
| 14 | 1982 | Nov. 18-20 | Tempe, Arizona, United States of America | W.L. Minckley & S.D. Gerking |
| 13 | 1981 | Nov. 19-21 | Death Valley, California, United States of America | Phil Pister |
| 12 | 1980 | Nov. 5-7 | Monterrey, Nuevo León, México | Salvador Contreras Balderas |
| 11 | 1979 | Nov. 15-17 | Death Valley, California, United States of America | Phil Pister |
| 10 | 1978 | Nov. 16-18 | Las Cruces, New Mexico, United States of America | Paul Turner |
| 9 | 1977 | Nov. 17-18 | Death Valley, California, United States of America | Phil Pister |
| 8 | 1976 | Nov. 18-20 | Grand Junction, Colorado, United States of America | Bill Miller |
| 7 | 1975 | Nov. 13-14 | Death Valley, California, United States of America | Phil Pister |
| 6 | 1974 | Nov. 12-14 | Las Vegas, Nevada, United States of America | Dale Lockar & Jim Deacon |
| 5 | 1973 | Nov. 13-14 | Tempe, Arizona, United States of America | W.L. Minckley & S.D. Gerking |
| 4 | 1972 | Nov. 14-16 | Death Valley, California, United States of America | Phil Pister |
| 3 | 1971 | Nov. 16-18 | Death Valley, California, United States of America | Phil Pister |
| 2 | 1970 | Nov. 17-18 | Death Valley, California, United States of America | Phil Pister |
| 1 | 1969 | Nov. 18-19 | Death Valley, California, United States of America | Phil Pister |
