Santa Monica Mountains Conservancy Programs The Santa Monica Mountains Conservancy is the overarching planning and public land acquisition entity for two counties, six mountain ranges, and ten Southern California cities. The agency’s success is based on alliances, partnerships, accumulated knowledge, and respected authority in the public discourse on Southern California natural resources. Major Conservancy programs include:The Santa Monica Mountains and Rim of The Valley Trail CorridorThe Los Angeles RiverCoastal Canyons and BeachesWallis Annenberg Wildlife CrossingGovernor Newsom’s 30 by 2030 Initiative