Question: What is one mountain range that separates coastal Southern California from the Great Basin?
Context: The Sevier Desert is a large arid section of central-west Utah, United States, and is located in the southeast of the Great Basin.  It is bordered by deserts north, west, and south; its east border is along the mountain range and valley sequences at the perimeter of the Great Basin, with the large north-south Wasatch Range and its associated mountainous landforms.  Its eastern border is specifically, the East Tintic, Gilson, and Canyon Mountains; also the massive Pavant Range. The Los Angeles Basin is a sedimentary basin located in southern California, in a region known as the Peninsular Ranges.  The basin is also connected to an anomalous group of east-west trending chain of mountains collectively known as the California Transverse Ranges.  The present basin is a coastal lowland area, whose floor is marked by elongate low ridges and groups of hills that is located on the edge of the Pacific plate.  The Los Angeles Basin, along with the Santa Barbara Channel, the Ventura Basin, the San Fernando Valley, and the San Gabriel Basin, lies within the greater southern California region.  On the north, northeast, and east, the lowland basin is bound by the Santa Monica Mountains and Puente, Elysian, Repetto hills.  To the southeast, the basin is bordered by the Santa Ana mountains and the San Joaquin Hills.  The western boundary of the basin is marked by the Continental Borderland and is part of the onshore portion.  The California borderland is characterized by north-west trending offshore ridges and basins.  The Los Angeles Basin is notable for its great structural relief and complexity in relation to its geologic youth and small size for its prolific oil production.  Yerkes et al. identify 5 major stages of the basin's evolution that begins in the Upper Cretaceous and ends in the Pleistocene.  This basin can be classified as an irregular pull-apart basin accompanied by rotational tectonics during the post-early Miocene. The Indigenous Peoples of the Great Basin are Native Americans of the northern Great Basin, Snake River Plain, and upper Colorado River basin.  The "Great Basin" is a cultural classification of indigenous peoples of the Americas and a cultural region located between the Rocky Mountains and the Sierra Nevada, in what is now Nevada, and parts of Oregon, California, Idaho, Wyoming, and Utah.  There is very little precipitation in the Great Basin area which affects the lifestyles and cultures of the inhabitants. The Great Basin Desert is part of the Great Basin between the Sierra Nevada and the Wasatch Range.  The desert is a geographical region that largely overlaps the Great Basin shrub steppe defined by the World Wildlife Fund, and the Central Basin and Range ecoregion defined by the U.S. Environmental Protection Agency and United States Geological Survey.  It is a temperate desert with hot, dry summers and snowy winters.  The desert spans a large part of the state of Nevada, and extends into western Utah, eastern California, and Idaho.  The desert is one of the four biologically defined deserts in North America, in addition to the Mojave, Sonoran, and Chihuahuan Deserts. The Gulf of Corinth is an active extensional marine sedimentary basin thought to have started deforming during the late Miocene – Pleistocene epoch.  The dimensions of the Gulf of Corinth are approximately 105 km long and 30 km wide with a basement depth of 3 km at its center.  This half graben basin is formed by a N100°E-oriented rift which separates the Peloponnese peninsula from the continental mainland of Greece.  Currently the Gulf's rift is opening at rate of 10–15 mm/yr, with respect to the Eurasia Plate.  The basin is bounded by the Peloponnese highlands to the south and the westward-moving Anatolian Fault to the north.  Major and minor fault planes make up the north and south margins, and its north-south extension is due to activity along a E-W to NW-SE oriented coastal southern margin.  The basin's active and inactive faults create associated syn-rift sediment fill.  These aspects provide a unique opportunity for scientists to study the tectonic and stratigraphic development of a rift, while further understanding how a basin is actually made. The Santa Ana winds are strong, extremely dry down-slope winds that originate inland and affect coastal Southern California and northern Baja California.  They originate from cool, dry high-pressure air masses in the Great Basin. Qaflankuh or Qaflankuh Mountain Range (Persian: رشته کوه‌ها‌ی قافلانکوه / Reshteh Kuh-hā-ye Qāflānkuh) is a mountain range that is located about 20 kilometres north of the city of Zanjan in Zanjan Province, Iran.  With an average width of almost 20 kilometres and a length of about 100 kilometres, this mountain range is stretched in a northwest-southeast direction, beginning from northwest of Zanjan, passing north of Zanjan and ending southeast of Zanjan.  The Qezel Owzan River flows in a valley that separates Qaflankuh Mountains on the south from Talish Mountains on the north.  With an elevation of 2971 metres, Mount Sendan Dagh is the highest mountain of the range which is located in the southeast section of this mountain range.  There are some mineral hot springs containing sulphur in different parts of this range.  Geologically, Qaflankuh Mountain Range was formed during the Tertiary volcanism and plutonism and is made mainly of the Eocene volcanic rocks with very small sections of intrusive rocks in the northern and southern parts of the range. The Great Basin Divide is the western continental divide that separates the Great Basin from the Pacific Ocean watershed.  The water divide is the perimeter of the largest set of contiguous endorheic watersheds of North America, including six entire USGS watershed subregions.  For example, the San Joaquin River subregion that drains to the Pacific is adjacent to the Great Basin's Mono-Northern Mojave subregion and central Lahontan subregion, and their triple point is on the Great Basin Divide. Eldorado Valley, or El Dorado Valley, is a Great Basin valley in the Mojave Desert southeast of Las Vegas and southwest of Boulder City, Nevada.  The valley is endorheic, containing the Eldorado Dry Lake.  The Great Basin Divide, transects ridgelines and saddles, on the north, northeast, east, and south around the valley, as the valley sits on the east of the McCullough Range, a Great Basin massif, on the Great Basin Divide at its north teminus and its south terminus. A sundowner is a northerly offshore wind in Santa Barbara, California.  It occurs when a region of high pressure is directly north of the area, the coast of which trends east–west.  This contrasts with the more typical onshore flow.  The winds blow with greatest force when the pressure gradient is perpendicular to the axis of the Santa Ynez Mountains, which rise directly behind Santa Barbara.  These winds often precede Santa Ana events by a day or two, as it is normal for high-pressure areas to migrate east, causing the pressure gradients to shift to the northeast.
Answer: Santa Ynez Mountains