There is a Sertoma show Nov. 28,29
and an RK show Dec. 12,13
Both at Phil long. It looks like the Phil long site is not filled in for the end of the year.

http://www.gunshows-usa.com/colorado.htm
http://www.rkshows.com/midwest/colorado.html
http://www.prospectorssertomagunshows.com/