section_path: Component counties, subregions, and cities/Los Angeles County/Subregions in Los Angeles County
section_name: Subregions in Los Angeles County
paragraph_text: Subregions in Los Angeles County
  
  While there is not an official designation for the regions that comprise Greater Los Angeles, one authority, the Los Angeles Times, divides the area into the following regions:
  
  Some of the above areas can be defined as being bounded by natural features such as mountains or the ocean; others are marked by city boundaries, freeways, or other constructed landmarks. For example, Downtown Los Angeles is the area of Los Angeles roughly enclosed by three freeways and one river: the Harbor Freeway (SR 110) to the west, the Santa Ana Freeway (US 101) to the north, the Los Angeles River to the east, and the Santa Monica Freeway (I-10) to the south. Meanwhile, the San Fernando Valley ("The Valley") is defined as the basin consisting of the part of Los Angeles and its suburbs that lie north-northwest of downtown and is ringed by mountains.