Situated northwards of the Los Angeles Basin , it comprises a large portion of Los Angeles , the incorporated cities of Burbank , Calabasas , Glendale , Hidden Hills and San Fernando , plus several unincorporated areas. The river flows eastward along the southern regions of the Valley. One of the river's two unpaved sections can be found at the Sepulveda Basin. The elevation of the floor of the valley varies from about ft m to 1, ft m above sea level.
Most of the San Fernando Valley is within the jurisdiction of the City of Los Angeles , [ 3 ] although a few other incorporated cities are located within the valley as well: Burbank is in the southeastern corner of the valley, and San Fernando , which is completely surrounded by the city of Los Angeles, is near the northern end of the valley. Universal City , an enclave in the southern part of the valley, is an unincorporated area housing the Universal Studios filming lot and theme park.
Mulholland Drive , which runs along the ridgeline of the Santa Monica Mountains, marks the boundary between the valley and the communities of Hollywood and the Los Angeles Westside.
The valley's natural habitat is a " temperate grasslands, savannas, and shrublands biome " of grassland , oak savanna , and chaparral shrub types of plant community habitats , along with lush riparian plants along the river, creeks, and springs. In this Mediterranean climate , posts European agriculture for the mission's support consisted of grapes , figs , olives , and general garden crops.
Due to its relatively inland location and other factors, summer days are typically hotter and winter nights typically colder than in the Los Angeles basin. Juan Francisco Reyes built an adobe dwelling beside a Tongva village or rancheria at natural springs known as Achooykomenga , but the land was soon taken from him so that a mission could be built there.
