Cancellation of the Boulder event may have been tied to this news bit last month (came out 2 days before the car meet):
http://www.denverpost.com/breakingnews/ci_19139739?IADID=Search-www.denverpost.com-www.denverpost.com
Looking forward to any kind of car related events. Folks tend to put their toys away for winter pretty early in this town.