Pretty sure the Denver Mart will be torn down in the immediate future. I'm involved in the Colorado trade show business (or was before Covid). If folks are looking for a 2022 Denver venue I may be able to help. As to the September date this year, it is the heart of Colorado mountain bird season. Blue grouse, ptarmigan, sage grouse and Columbian sharptail seasons are all open and it is prime time for each of these species. I'll likely stay home for the weekend and attend.