Colo. Rev. Stat. § 37-42-102
Upon the filing of such petition and the approval of the bond, the board of county commissioners shall communicate with the state engineer with reference thereto, and together they shall agree upon a date for hearing upon such petition, which shall in no case be later than ninety days from the date of filing thereof, and, in case no agreement is reached with reference to such date of hearing, it shall be had on the Tuesday next after the expiration of sixty days from the date of filing of such petition. During at least the four weeks immediately preceding such date for hearing, the board of county commissioners shall cause notice thereof to be published in some newspaper of general circulation published in each of the counties wherein any portion of the area of said proposed district lies, and, in case no such newspaper is published in any such county, the notice shall be given by posting the notice at the county courthouse in such county and in at least one conspicuous point within the area of such proposed district which lies in such county during the same time that publication is required, where a newspaper is available therefor.
C.R.S. § 37-42-102
For publication of legal notices, see part 1 of article 70 of title 24.