Antiquities Act to designate these sites as National Monuments. Onshore units Six onshore units comprise of public land: Trinidad Head, Waluplh-Lighthouse Ranch, Lost Coast Headlands, Point Arena-Stornetta, Cotoni-Coast Dairies, and Piedras Blancas. Cotoni-Coast Dairies Unit Cotoni-Coast Dairies is part of the California Coastal National Monument in Santa Cruz County, California, north of the city of Davenport. For most of the 20th century, Coast Dairies was run as a farm and ranching operation by the descendents of two Swiss families. After it was purchased by Save the Redwoods League in 1998, it was transferred to Trust for Public Land. In 2006, about of its beaches to create Coast Dairies State Park. Most of the rest of the land has been transferred to the Bureau of Land Management. In 2014, the Bureau of Land Management bought a tract of land on the inland side of the highway adjacent to the coastal parcels. President Barack Obama designated Cotoni-Coast Dairies as a National Monument in 2017. The Bureau of Land Management developed a management that was approved by the California Coastal Commission in 2020. Some of the land east of the highway will continue to be used for farming, but most will become open to the public. See also California Coastal Commission California Coastal Trail List of national monuments of the United States References External links POINT ARENA STORNETTA UNIT, includes trail map, at Mendocino Land Trust National Monuments in California Marine sanctuaries in California Bureau of Land Management National Monuments Bureau of Land Management areas in California Parks in Southern California Protected areas of Southern California 2000 establishments in California Protected areas established in 2000 West Coast of the United States Units of the National Landscape Conservation System