Colorado is a “no-fault” divorce/Dissolution Of Marriage State, and all determinations are made “without regard to fault.” You must have been a resident for at least ninety days preceding the filing of a Petition For Dissolution of Marriage, and at least ninety days must have elapsed following the filing, until the Court is able to issue a Decree of Dissolution of Marriage. During the time between the filing of the Petition, and issuance of a Decree you will be required to participate in alternative dispute resolution, or mediation, to resolve all issues by agreement.
A Legal Separation addresses the same issues, in the same manner as a divorce/Dissolution of Marriage proceeding. The only “real” difference is the decree is issued as a Decree of Legal Separation. Six months after the decree is issued, either party may ask the Court to convert it to a Decree of Dissolution.