Colo. Rev. Stat. § 39-11-131
Any number of tracts or parcels of land not exceeding twenty-five, whether contiguous or noncontiguous, or whether claimed or held under one or more titles or ownerships, or whether included in an irrigation district or not so included, and although tax liens for such tracts or parcels of land were separately sold at the tax sale or covered by more than one tax sale certificate, may be included and described in one notice of application for tax deed provided for in section 39-11-128. Such tracts or parcels, not exceeding twenty-five in number, may also be included and described in a single request for tax deed if such notice and the service thereof and such request are in conformity with section 39-11-128 in other respects. The name of the person in whose name the land for which a tax lien was sold was taxed or specially assessed for the year for which the tax lien was sold shall be prominently displayed in said notice at or near the beginning thereof and near or with a reference to the number of the tax sale certificate and the description of the land involved, sufficient to enable identification of the land with the name of the person assessed if all certificates so sought to be included in a single notice or request are held by but one person, or jointly held by more than one person.
C.R.S. § 39-11-131