Oregon Revised Statutes Public Lands § 275.320

The governing body of a county may, by order, designate as county forests, public parks or recreational areas any real property heretofore or hereafter acquired by the county for delinquent taxes or otherwise. Where the park or recreational area is situated in whole or in part within the corporate limits of any city the county first shall obtain the consent or approval, by resolution or ordinance adopted by the city consenting or approving the creation of the public park or recreational area.