After checking our laws a couple of days back (in regards to some arguments on another thread)... there are NO GUN FREE ZONES in Colorado, except Schools. That’s Federally mandated according to the three organizations I checked with.
In Colorado (I live here) property owners can post a no firearms sign. Many stores and shopping malls are posted. The Missionary School had a no firearms policy per the Rocky Mountain News article. If you are licenced to carry a concealed firearm you can be asked to leave a posted property, but not charged. If you refuse to leave the property you can be charged with trespassing.
WOW. I didn't know that. Let's hope that now that the DemocRATS are in the majority, that doesn't change. I'm happy to hear that Colorado actually abides by the second amendment!