Located less than two hours from California’s Sacramento and San Francisco Bay areas, the BRBNA includes the rugged, natural landscapes and rangelands of the Putah and Cache Creek watersheds. The BRBNA is bounded on the east by the Capay and Sacramento Valleys, on the west by the Clear Lake basin and the Napa River watershed, on the north by the Mendocino National Forest, and extends southward towards Interstate 80 in Solano County. The area’s diverse geology straddles an ancient contact between the North American and Pacific tectonic plates, and supports a unique assemblage of ecological communities including serpentine chaparral, grasslands, oak savanna, oak and mixed oak/ coniferous woodlands, and riparian and cliff habitats. Wildlife species abound, with a diversity of birds, mammals, amphibians, reptiles, fish, and invertebrates. The area is sufficiently remote and large enough to support tule elk, bald and golden eagles, mountain lions and bears, as well as a variety of hawks, osprey, harriers, falcons, owls, and other raptors. The serpentine soils of the region host a large number of indigenous plants, while Cache and Putah Creeks and their tributaries, as well as the region’s lakes, provide abundant riparian and fisheries habitat.