The South Lahonton hydrologic region encompasses several interior basins east of the Sierra Nevada and the

Transverse Ranges The Transverse Ranges are a group of mountain ranges of southern California, in the Pacific Coast Ranges physiographic region in North America. The Transverse Ranges begin at the southern end of the California Coast Ranges and lie within Santa ...

, with an area of . It covers the western portion of the

Mojave Desert The Mojave Desert ( ; mov, Hayikwiir Mat'aar; es, Desierto de Mojave) is a desert in the rain shadow of the Sierra Nevada mountains in the Southwestern United States. It is named for the indigenous Mojave people. It is located primarily ...

and a southwestern portion of the Great Basin desert, and extends into the

forests A forest is an area of land dominated by trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, and ecological function. The United Nations' ...

of the southeastern Sierra Nevada and the montane chaparral and woodlands of the northeastern Transverse ranges. The ecoregion has an arid to semi-arid climate, with average annual rainfall of . The region is closed or endorheic, and none of its rivers or streams reach the sea. They instead empty into lake beds from which the water evaporates, leaving deposits of salts and other minerals. There are some year-round mountain streams and springs, but most the large rivers are intermittent, and the lakes vary in extent based on variations in rainfall and runoff.

Perennial stream A perennial stream is a stream that has continuous flow of surface water throughout the year in at least parts of its catchment during seasons of normal rainfall, Water Supply Paper 494. as opposed to one whose flow is intermittent. In the abse ...

s include the

Owens River The Owens River is a river in eastern California in the United States, approximately long.U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed March 17, 2011, It drains into and through the ...

and tributaries to

Mono Lake Mono Lake ( ) is a saline soda lake in Mono County, California, formed at least 760,000 years ago as a terminal lake in an endorheic basin. The lack of an outlet causes high levels of salts to accumulate in the lake which make its water a ...

, such as Rush Creek and Lee Vining Creek.

Drainage basin A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, ...

s include the

Antelope Valley The Antelope Valley is located in northern Los Angeles County, California, and the southeast portion of Kern County, California, and constitutes the western tip of the Mojave Desert. It is situated between the Tehachapi, Sierra Pelona, and t ...

watershed, the Mojave watershed,

Mono Basin The Mono Basin is an endorheic drainage basin located east of Yosemite National Park in California and Nevada. It is bordered to the west by the Sierra Nevada, to the east by the Cowtrack Mountains, to the north by the Bodie Hills, and to the sou ...

, the Owens River watershed, and the Amargosa River watershed.

References

Endorheic basins of the United States {{California-geo-stub