True for "most" campuses. But you can always enroll at one of the finer schools in Colorado - C.S.U. in Ft. Collins. Which doesn't ban firearms. However, to legally own a handgun you need to be 21, so that limits handgun carry to upperclassmen since most folks start college at a younger age. The C.U. campus in Boulder has banned firearms for a long time, but the courts just said that they cannot do that anymore.

Realistically, trying to defend yourself against an assailant who is armed with a firearm, you're just not going to have much luck with anything EXCEPT another firearm or an automobile (to run them over). I sure wouldn't go up and pepperspray someone waving a gun around. That's just stupid.

If you cannot or choose not to arm yourself to deal with an armed threat, then the best course of action is situational awareness and a pre thought out plan of how to get the hell out of Dodge. Actually, those other things are equally as important even when you ARE armed yourself.