Hills Regional Park References External links Large collection of photos and trail descriptions of Don Edwards Wildlife Refuge Don Edwards San Francisco Bay National Wildlife Refuge – US Fish and Wildlife Service official site. Don Edwards San Francisco Bay National Wildlife Refuge: Final Comprehensive Conservation Plan US Fish and Wildlife Service San Francisco Bay National Wildlife Refuge Complex South Bay Salt Pond Restoration Project Cargill Salt – San Francisco Bay From Salt Ponds to Wetlands, Quest, KQED-TV. YouTube footage Wetlands of California Wetlands of the San Francisco Bay Area National Wildlife Refuges in California Protected areas of Alameda County, California Protected areas of San Mateo County, California Protected areas of Santa Clara County, California Protected areas established in 1974 San Francisco Bay Tourist attractions in Fremont, California Landforms of Alameda County, California Landforms of San Mateo County, California Landforms of Santa Clara County, California San Francisco Bay Trail