CA Gov't Code Section 38510

No abandonment or sale of a park pursuant to this article shall affect any private easement or other right in lands acquired or owned by any private person or corporation, nor shall such abandonment or sale affect any right, easement, or interest owned or under the control of any other governmental agency for public use other than park purposes.

In the absence of an express or implied reservation of a right of reversion in the dedication or instrument of purchase, the park lands abandoned pursuant to this article shall not revert to private ownership.