| Santa Ynez Mountains | |
|---|---|
 Upper San Roque Canyon in the Santa Ynez Mountains, Santa Barbara County | |
| Highest point | |
| Peak | Peak 4864 |
| Elevation | 4,864 ft (1,483 m) |
| Coordinates | 34°28′47″N 119°25′55″W / 34.47972°N 119.43194°W |
| Geography | |
 | |
| Country | United States |
| State | California |
| District(s) | Santa Barbara County Ventura County |
| Range coordinates | 34°30′03″N 119°43′47″W / 34.5009°N 119.72969°W |
The Santa Ynez Mountains are a portion of the Transverse Ranges, part of the Pacific Coast Ranges of the west coast of North America. It is the westernmost range in the Transverse Ranges.
The range is a large fault block of Cenozoic age created by the movements of the Santa Ynez Fault. A very narrow range, the Santa Ynez Mountains rise quickly on its north side and drops off equally dramatically along the range's south face along the Gaviota Coast. The Santa Ynez Mountains begin as a series of volcanic hills near Point Arguello, and gradually transitions eastward into a single, well-defined ridge extending from Gaviota Peak to Matilija Creek. The range is approximately contiguous with the Topatopa Mountains beyond to the east, which terminates abruptly at Sespe Creek.
The climate of the range is Mediterranean with most of the precipitation falling between November and March. Most of the range lies in the California chaparral and woodlands ecoregion. At the crest and on the north slope, the rainier regions support extensive oak woodlands, mixed with other broadleafed species such as madrone, sycamore and bay laurel, along with some conifers, primarily Coulter pines.