HHORA is a cooperating nonprofit association designed to support Hollister Hills State Vehicular Recreation Area (SVRA). The Board of Directors is made up of volunteers that support and implement activities and events for the Association. HHORA supports the educational and interpretive activities within Hollister Hills (SVRA).

HHORA assists the park in a wide variety of ways ranging from sponsoring special projects and staff training, to holding special events for club members.