Cal. Pub. Res. Code § 5151

Any county or city may donate, convey, and grant to the State any real property owned by it, or which it may acquire, for a park, playground, recreational center, or beach used for recreational purposes. It may use any part of its funds, including funds received by bequest, gift, donation, and those received in trust for the acquisition of such properties, as may be necessary to assist the State in acquiring any park, playground, recreational center, or beach for recreational purposes, to be cared for, maintained, and controlled under any agreement or arrangement authorized by article one of chapter one of this division.