Here an updated list of local comic/science-fiction/anime/etc. conventions in the Colorado area in 2018! I thought there couldn't be any more, but then I found one...
NOTE: This does not include gaming conventions. I thought about adding them, but decided against it, just because I'm unlikely to ever go.
MileHighCon 50October 19-21
Chey-Fy Comic Expo
October 26-28
CO Springs Comic and Toy Con
November 3
DakuCon
November 9-11
Rocky Mountain Con
November 10-11
ChromicCon
November 10
Denver Retro Con
November 18
And a cosplay photo -- Harley Quinn (DC Super Hero Girls style) at WPL Mini Con 2018:

Recent pages I added to the Christmas Specials Wiki:
Santa Jaws