C.R.S. § 34-51-105

All owners of mining claims or parties interested therein, including encumbrancers, shall have the right to appear and plead to such petition, and if any material allegations of the same are traversed, the issue shall be tried to the court as in equity cases, and if default is made and no traverse or other objection to the petition filed, the court shall nevertheless require proof of all the material allegations of the petition.