Con-Version
Here are the past conventions that have been held. There are some missing information regarding guests, places and times. Guest(s) of Honour = GoH
Jack McDevitt - GoH,
Rebecca Bradley - Science GoH, 
EDGE - Guest Publisher,
Kirstin Morrell - Chair
Larry Niven - GoH,
David Weber - Author Guest,
R.Scott Baker - Author Guest,
Derek France, Raelyn MacKay - Chairs.
Mini-Con Guests:,
Robert J. Sawyer - GoH, 
Karen Sim- Artist GoH, 
Phil Bacon- Fan GoH, 
Paul Bushell- Fan GoH, 
Derek France- Chair. Westercon 58 Guests: 
SM Stirling- Author GoH,
Mark Ferrari- Artist GoH,
Cliff and Eileen Samuels- Fan GoH,
Dave Duncan- Canadian Author GoH,
Tom Doherty (TOR) - Publisher GoH,
David Hartwell (TOR) - Editor GoH,
Dr. Phil Currie- Science GoH,
Randy McCharles, John Mansfield- Co-Chairs
George RR Martin- GoH,
James Beveridge- Artist GoH,
Spider Robinson and Jeanne Robinson- Canadian GoH,
The Arrogant Worms- Special guests,
Lisa Reinhardt- Chair
Terry Brooks- GoH, Writers Workshop,
Tania Diatalevi-Hodges- Artist GoH,
Robert J. Sawyer- Canadian GoH - Special Guest,
Dr. Phil Currie- Science GoH,
Esther Friesner- Toastmaster,
Lisa Reinhardt- Chair
Guy Gavriel Kay- GoH,
Lar deSouza- Artist GoH,
James Alan Gardner- Canadian GoH,
Geoffrey A. Landis- Science Guest,
Robert J. Sawyer- Toastmaster,
ConSpec Guests: Allan Steele, Michael Bishop, Peter Watts, Jeff de Boer,
Paul Bushell- Chair
David Drake - GoH,
Jean-Pierre Normand - Artist GoH,
Dr. Bill Brooks - Science Guest,
Cliff Samuels- Toastmaster,
Dirk Benedict- Special Media Guest,
Patrick Sweson and Honna Swenson- Writers Workshop Guests,
Paul Bushell- Chair
Mike Resnick - GoH,
Julia Lacquement - Artist GoH,
Candas Jane Dorsey - Canadian GoH,
Thor Osborn - Science Guest,
Mike Dale - Media Guest,
Michael McAdam - Toastmaster/ Fan GoH,
Paul Bushell- Chair
Moves to the third weekend of August. Ben Bova - GoH,
Tanya Huff - Canadian Guest,
Gregory Bennett - Science Guest,
L.E.Modesett Jr. - Special Fantasy Guest,
Brenna Toblan- Chair
Joe Haldeman - GoH,
J. Michael Straczynski - Special Guest,
Bridget Landry - Science Guest,
Clifford Samuels - Master of Ceremonies,
Dr. Phil Currie - Science Guest,
J. Brian Clarke - Canadian Guest,
Dave Duncan - Canadian Guest,
Brenna Toblan - Chair (?)
Kim Stanley Robinson - GoH,
Connie Willis - Toastmaster,
Robert J. Sawyer - Canadian Guest,
Chair - unknown
C. J. Cherryh - GoH,
Mel Gildon - Toastmaster,
Elisabeth Vonarburg - Canadian Guest,
Dr. Phil Currie - Science Guest,
Robert J. Sawyer - IFWA (writers workshop) Guest,
Gary Frei- Chair
Lois McMaster Bujold - GoH,
Greg Bear - Toastmaster,
Len Wein - Comic Author Guest,
Bruce Hallenback - Media,
Veronica Carlson - Hammer Films,
Ryah Deines - Chair
Frederik Pohl - GoH,
David Gerrold - Toastmaster,
Sean Russell - Canadian Guest,
Dr. Phil Currie - Science Guest,
L. Sprague de Camp and Catherine Crook de Camp - GoH,
Ed Bryant - Toastmaster,
Ken Macklin - Artist Guest,
Dave Duncan - Canadian Guest
David Brin - GoH,
Peter David - Toastmaster,
Michael Coney - Canadian Guest
Stephen R. Donaldson - GoH,
George R.R. Martin - Toastmaster,
Dean Ing - Writers Workshop Guest,
J. Brian Clarke - Special Guest,
Leslie Gadallah - Canadian Guest,
Real Musgrave - Artist Guest
Jack Vance - GoH,
Mike Resnick - Toastmaster,
Spider Robinson and Jeanne Robinson - Canadian Guests,
William Hartmann - Science Guest
Harry Harrison - GoH,
Barry Longyear - Toastmaster,
Guy Gavriel Kay - Canadian Guest
Robert Silverberg - GoH,
Karen Haber Silverberg - GoH,
Ed Bryant - Toastmaster,
William Gibson - Canadian Guest,
Crawford Killian - Writers Workshop Guest,
L. Sprague de Camp and Catherine Crook de Camp - Special Guests,
Patricia Rose Deignan - Industrial Light & Magic - Media
Joan Vinge - GoH,
Jim Frenkel - Toastmaster,
Jack Williamson - Special Guest,
Crawford Killian - Canadian Guest
Jack L. Chalker - GoH,
Phyllis Gotlieb - Toastmaster,
Mike Grell - Comic Guest,
Julia Lacquement - Comic Guest,
Bjo Trimble - Fan Guest,
Sonni Cooper - Fan Guest
Poul Anderson and Karen Anderson - GoH,
Frank M. Robinson - Toastmaster
L. Sprague de Camp - GoH,
Catherine Crook de Camp - GoH
Past Conventions
The convention was originally held on the third weekend of July.