Colo. Rev. Stat. § 15-12-1304
Any interested person or person who may be affected by the ownership of the decedent's interest in the property, the descent or succession of which is to be determined in the petition, may appear and object and establish any proper defense to the petition or any part thereof, or assert or protect any interest the person may claim. An appearance and objection must be presented in writing within the time period for filing an objection as set forth in the notice; except that, for good cause, the court may allow an entry of appearance and objection by an interested person or person who may be affected by the ownership of the property at any time prior to the entry of the court's judgment and decree. If an interested person or person who may be affected by the ownership of the property appears and files a timely objection, the court shall proceed with the hearing on the petition; except that the court may continue the hearing in its discretion or direct such further proceeding as the court may determine. Otherwise, if after proper service pursuant to section 15-12-1303 there are no objections filed to the petition, then the court may enter a judgment and decree pursuant to this part 13 without a hearing.
C.R.S. § 15-12-1304
This section is similar to former § 15-12-1302 as it existed prior to 1993.