page_title: Simi Valley, California
section_title: Geography
hierarchical_section_title: Simi Valley, California / Geography
caption_attribution_description: English: Santa Susana Pass Road looking west from Topanga Canyon Boulevard in Chatsworth, Los Angeles
context_page_description: The city of Simi Valley, in the eponymous valley, is in the southeast corner of Ventura County, California, United States, 40 miles from downtown Los Angeles, making it part of the Greater Los Angeles Area. The city sits next to Thousand Oaks, Moorpark, and Chatsworth. The city's 2019 population has been estimated at 125,613, up from 124,243 in 2010. The city of Simi Valley is surrounded by the Santa Susana Mountain range and the Simi Hills, west of the San Fernando Valley, and northeast of the Conejo Valley. It grew as a commuter bedroom community for the cities in the Los Angeles area and the San Fernando Valley when a freeway was built over the Santa Susana Pass.
  The Ronald Reagan Presidential Library, where the former president was buried in 2004, is in Simi Valley. The Reagan Library has hosted Republican primary debates, the last in 2012, and the first primary debate in 2016.
context_section_description: Simi Valley is a city located in the very southeast corner of Ventura County, bordering the San Fernando Valley in Los Angeles County, and is a part of the Greater Los Angeles Area. The City of Simi Valley basically consists of the eponymous valley itself. City of Simi Valley borders the Santa Susana Mountains to the north, the Simi Hills to the east and south, and is adjacent to Thousand Oaks to the southwest and Moorpark to the west. Simi Valley is connected to the nearby San Fernando Valley by the Santa Susana Pass in the extreme east of Simi Valley. Simi Valley is located at 34°16'16" North, 118°44'22" West (34.271078, −118.739428) with an elevation of 700–1,000 ft (210–300 m) above sea level. The syncline Simi Valley is located in the western part of the region called the Transverse Ranges. The valley is surrounded by the Santa Susana Mountains to the north and Simi Hills to the east and south. While the Santa Susana Mountains separate the valley from the Los Padres National Forest in the north, the Simi Hills separate it from Conejo Valley in the south. In the extreme east is Rocky Peak, one of Santa Susana Mountains' highest peaks, which is a dividing line between Ventura County to the west and Los Angeles County to the east. On the other side of the valley, in the extreme west side of Simi Valley is Mount McCoy, which may be most known for its 12 ft. concrete cross that sits at its peak. The physiographical valley is a structural as well as a topographic depression. The Simi Valley, just as neighboring San Fernando Valley, owes its existence and shape to the faulting and folding of the rocks. It is essentially a structural valley and not wholly the work of erosion. It is drained by the Calleguas Creek and also its principal tributary, Conejo Creek. Both of these originate in the Santa Susana Mountains.
  According to the United States Census Bureau, the city has a total area of 42.2 sq mi (109.4 km²), comprising 41.5 sq mi (107.4 km²) of land and 0.77 sq mi (2.0 km²), or 1.81%, of it is water. Simi Valley is located northwest of the Los Angeles neighborhood of Chatsworth and approximately 30 mi (48 km) from Downtown Los Angeles, 380 mi (610 km) south of San Francisco, 160 mi (260 km) north of San Diego, and 350 mi (560 km) south of Sacramento. Commutes to Los Angeles are usually via the Ronald Reagan Freeway (Highway 118) or the Southern California Metrolink commuter train, which makes several daily trips from Simi Valley. Simi Valley has a mediterranean climate. Temperate variations between day and night tend to be relatively big. The mean annual temperature is 64.1 degrees, while the annual precipitation is 18.39 inches. The precipitation remains less than one inch for seven months – April until October, – while the precipitation exceeds four inches in the two wettest months – January and February. While the mean temperature is at its lowest at 53.6 degrees in December, the mean temperature in July and August exceeds 76 degrees.
  Simi Valley has been the victim of several natural disasters, including the flood of 1967, the storm of 1983, the 1988 lightning strike, as well as the 1994 Northridge earthquake and numerous wildfires.
caption: Santa Susana Pass is a mountain pass in the Simi Hills connecting the San Fernando Valley and the Simi Valley.
exif: {"Image ImageDescription": "OLYMPUS DIGITAL CAMERA", "Image Make": "OLYMPUS IMAGING CORP.", "Image Model": "XZ-1", "Image Orientation": "Horizontal (normal)", "Image Software": "darktable 1.4.1", "Image DateTime": "2014:03:22 21:04:23", "Image Artist": "", "Image Rating": "1", "Image Tag 0x4749": "20", "Image Copyright": "", "Image ExifOffset": "956", "Image DateTimeOriginal": "2014:03:19 15:01:03", "Image PrintIM": "[80, 114, 105, 110, 116, 73, 77, 0, 48, 51, 48, 48, 0, 0, 28, 0, 1, 0, 18, 0, ... ]", "EXIF ExposureTime": "1/640", "EXIF FNumber": "4", "EXIF ExposureProgram": "Program Normal", "EXIF ISOSpeedRatings": "100", "EXIF ExifVersion": "0221", "EXIF DateTimeOriginal": "2014:03:19 15:01:03", "EXIF DateTimeDigitized": "2014:03:19 15:01:03", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "17/10", "EXIF MeteringMode": "CenterWeightedAverage", "EXIF LightSource": "Unknown", "EXIF Flash": "8", "EXIF FocalLength": "363/20", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "2400", "EXIF ExifImageLength": "1920", "EXIF FileSource": "Digital Camera", "EXIF CVAPattern": "[2, 0, 2, 0, 0, 1, 1, 2]", "EXIF CustomRendered": "Custom", "EXIF ExposureMode": "Auto Bracket", "EXIF WhiteBalance": "Manual", "EXIF DigitalZoomRatio": "1", "EXIF FocalLengthIn35mmFilm": "84", "EXIF SceneCaptureType": "Standard", "EXIF GainControl": "None", "EXIF Contrast": "Normal", "EXIF Saturation": "Normal", "EXIF Sharpness": "Normal"}