The Carrizo Plain National Monument, designated in 2001, is the last intact native grassland in California. At almost a quarter of a million acres, the area is bisected by the San Andreas Fault and harbors endangered, threatened, and rare animal species such as the San Joaquin kit fox, the California condor, the San Joaquin antelope squirrel, the longhorn fairy shrimp, and the vernal pool fairy shrimp. The 3,000-acre alkali Soda Lake sits at the bottom of the valley, providing important winter habitat for lesser sandhill cranes, long-billed curlews, and mountain plover. Historic mining and ranching properties dot the landscape along with ancient signs of the Chumash, Salinian and Yokut peoples.