No. In order to carry in Colorado, your state has to issue you a permit, you have to be over 21, and your state has to recognize reciprocity with Colorado.
From
http://cbi.state.co.us/ic/Reciprocity.html
"Last updated 12/05/2011
"Updates are made only when there is a change to Colorado's permit reciprocity with other states. Regardless of the date of the last update, this information is current.
"Pursuant to Colorado law (CRS 18-12-213), the State of Colorado will recognize a valid permit issued in another state IF the permit was issued to a resident of the state issuing the permit, and the permit tee is 21 yrs of age or older, AND the other state recognizes Colorado permits as valid in their state. Hence, a "yes" in the following table also indicates that a valid Colorado permit is recognized in that state, subject to their laws. When traveling with a Colorado permit, it is advisable to contact the state you are visiting to confirm reciprocity and to review that state's firearms laws.
"The state of Colorado no longer recognizes the validity of any permit issued by any state to a nonresident of that state (see C.R.S 18-12-213 amended 2007), specifically they must be a resident of the state that issued the concealed handgun permit and must be in possession of a valid drivers license or identification card issued by that same state."
After this follows a table of reciprocity.
And, I found this with google using search term
colorado concealed carry reciprocity