C.R.S. § 29-7-103

Any city, town, village, county, or school district may operate such a system independently or may cooperate in its conduct in any manner which is mutually agreed upon or may delegate the operation of the system to a recreation board created by any or all of them and appropriate money voted for this purpose to such board, and it may make charges and require the payment of fees for the admission to and use and enjoyment of such recreation facilities and playgrounds.