As I understand it, the deadline to register to vote in Colorado for the November 4, 2008 general election is October 6, 2008.
You must be a U.S. citizen to register to vote.
You may register to vote, even if you are not yet age eighteen, if you will be eighteen years old on election day.
You may register to vote, even if you have a felony record, or are serving a probation sentence, but may not register to vote if you are incarcerated for a felony or are serving a parole sentence for a felony.
Voting itself begins in twenty-six days.