They are some of the most iconic Sonoma County landscapes, taking in sweeping coastal vistas and oak-studded inland ridges, all of it set aside with taxpayer money. But the agency responsible for those transactions, the Sonoma County Agricultural Preservation and Open Space District, has found itself owning some of those tracts for far longer than ever intended.

People who care about California’s state parks met in Berkely on Thursday to imagine how new kinds of partnerships could save some of the 70 parks now marked for closure. One of those partnerships, it was announced, could involve Sonoma County Regional Parks and the conservation group LandPaths.