Revenue derived from a tax imposed under this article shall be deposited in a special fund in the county treasury or district treasury. Such fund may be expended only to defray the reasonable expense of collecting such tax and for the maintenance, acquisition and construction of trails for horseback riders and hikers, but moneys in the fund may be used as local matching moneys for any federal or state grant for such purposes or for matching funds in the acquisition and development of a federal or state trails project.