The California Wilderness is envisioned as encompassing the wildest and least populated lands of California within the Mediterranean climatic zone. As illustrated below, it would stretch south from the San Francisco Bay Area to the mountains just north of Los Angeles. East to west it would extend from the Central Valley to the Pacific Coast at Big Sur.
The rebirth of the future California Pleistocene landscape began in the late 1970s with the relocation of tule elk into the Diablo Range in the northern wilderness reaches. This successful move was followed by the reintroduction of pronghorn antelope and tule elk to the Carrizo Plain in the central lands east of the Big Sur.
Beside wildlife currently extant in these lands, the wilderness would include representatives or relatives of animals once inhabiting California. California Megafauna Chart below lists potential wildlife inhabitants in the ultimate wilderness. One example would be the African Elephant to represent the place of the Columbian Mammoth in the reconstituted pleistocene landscape. Most symbolic of the animals is the grizzly bear, whose only current residence in California is on the state flag. Its closest American relatives are found in the Yellowstone region of the Rocky Mountains south of the Canadian border.
The California Wilderness would be linked by wildlife corridors to the Mohave Desert and the Sierra Nevada Wildernesses. The Mohave corridor would cross the Tehachapi Mountains that enclose the south end of the Central Valley.