Ventura County, California in the context of "San Diego–Imperial (California)"

Southern California (commonly shortened to SoCal) is a geographic and cultural region that generally comprises the southern portion of the U.S. state of California. Its densely populated coastal region includes Greater Los Angeles (the second-most populous urban agglomeration in the United States) and San Diego County (the second-most populous county in California). The region generally contains ten of California's 58 counties: Los Angeles, San Diego, Orange, Riverside, San Bernardino, Kern, Ventura, Santa Barbara, San Luis Obispo, and Imperial counties.

Although geographically smaller than Northern California in land area, Southern California has a higher population, with 23.76 million residents as of the 2020 census. The sparsely populated desert region of California occupies a significant portion of the area: the Colorado Desert, along with the Colorado River, is located on Southern California's eastern border with Arizona, and the Mojave Desert shares a border with Nevada to the northeast. Southern California's southern border with Baja California is part of the Mexico–United States border.

The Central Coast is an area of California, roughly spanning the coastal region between Point Mugu and Monterey Bay. It lies northwest of Los Angeles and south of the San Francisco Bay Area, and includes the rugged, rural, and sparsely populated stretch of coastline known as Big Sur.

From south to north, there are six counties that make up the Central Coast: Ventura, Santa Barbara, San Luis Obispo, Monterey, San Benito, and Santa Cruz.

The South Coast is a region of California, making up roughly the southernmost quarter of the Californian coast.

A Southern California coastal bioregion is defined by California Environmental Resources Evaluation System (CERES) as including parts of six counties: the western section of Ventura, all of Orange, the majority of Los Angeles, the southwestern corner of San Bernardino, the western area of Riverside, and the majority of western San Diego. CERES calls this the South Coast Bioregion.

Frazier Mountain (Samala: Toshololo) is a broad, pine-forested peak in the Transverse Ranges System, within the Los Padres National Forest in northeastern Ventura County, California. At 8,017 feet (2,444 m), Frazier Mountain is the sixteenth-highest mountain in the Transverse Ranges of Southern California.

Anacapa Island (Chumash: Anyapax, meaning "mirage, illusion") is a small volcanic island located about 11 miles (9.6 nmi; 18 km) off Port Hueneme in Ventura County, California. The island is composed of a series of narrow islets 6 mi (10 km) long, oriented generally east–west and 5 mi (8 km) east of Santa Cruz Island. The three main islets, East, Middle, and West Anacapa, have precipitous cliffs, dropping off steeply into the sea.

Anacapa is the smallest of the northern islands of the Channel Islands archipelago, and is within the Channel Islands National Park. It is 9 miles (7.8 nmi; 14 km) across the Santa Barbara Channel from the nearest point on the mainland. It lies southwest of the city of Ventura, California. The northern waters of Anacapa Island are protected by the Anacapa State Marine Reserve, which is one of the MPAs existing in the Channel Island National Park.

The Santa Barbara Channel is a portion of the Southern California Bight and separates the mainland of California from the northern Channel Islands. It is generally south of the city of Santa Barbara, and west of the Oxnard Plain in Ventura County.

It trends east–west, is approximately 130 kilometres (70 nmi) long and averages about 45 kilometres (24 nmi) across, becoming narrowest at its easternmost extremity where Anacapa Island is about 30 kilometres (16 nmi) from the mainland. During the last ice age, the four northern Channel Islands, including Santa Rosa Island, were conjoined into Santa Rosae, a single island that was only five miles (8 km) off the coast.

Ventura, officially named San Buenaventura (Spanish for "Saint Bonaventure"), is a city in and the county seat of Ventura County, California, United States. It is a coastal city located northwest of Los Angeles. The population was 110,763 at the 2020 United States census. Ventura is a popular tourist destination, owing to its historic landmarks, beaches, and resorts.

Ventura has been inhabited by different peoples, including the Chumash Native Americans, for at least 10,000 years. With the arrival of Spanish missionaries in 1782, Mission San Buenaventura was established by Junípero Serra, giving the city its name. Following the Mexican secularization act of 1833, San Buenaventura was granted by Governor Pío Pico to Don José de Arnaz as Rancho Ex-Mission San Buenaventura and a small community arose. Following the American Conquest of California, San Buenaventura was eventually incorporated as a city in 1866. The 1920s brought a major oil boom which significantly developed and expanded Ventura, a growth that continued with the post–World War II economic expansion.

The Oxnard Plain is a large coastal plain in southwest Ventura County, California, United States surrounded by the mountains of the Transverse Ranges. The cities of Oxnard, Camarillo, Port Hueneme and much of Ventura as well as the unincorporated communities of Hollywood Beach, El Rio, Saticoy, Silver Strand Beach, and Somis lie within the over 200-square-mile alluvial plain (520 km). The population within the plain comprises a majority of the western half of the Oxnard-Thousand Oaks-Ventura Metro Area and includes the largest city along the Central Coast of California. The 16.5-mile-long coastline (26.6 km) is among the longest stretches of continuous, linear beaches in the state.

The high quality soils, adequate water supply, favorable climate, long growing season, and level topography are characteristic of the Oxnard Plain where the top cash crops are strawberries, raspberries, nursery stock and celery. Ventura County is one of the principal agricultural counties in the state and it is a significant component of the economy with a total annual crop value in the county of over $1.8 billion in 2014. There is strong public sentiment for retaining agricultural production, as reflected in the SOAR (Save Open Space and Agricultural Resources) initiatives that have been approved by voters.

State Route 1 (SR 1) is a major north–south state highway that runs along most of the Pacific coastline of the U.S. state of California. At 656 miles (1,056 km), it is the longest state route in California, and the second-longest in the US after Montana Highway 200. SR 1 has several portions designated as either Pacific Coast Highway (PCH), Cabrillo Highway, Shoreline Highway, or Coast Highway. Its southern terminus is at Interstate 5 (I-5) near Dana Point in Orange County and its northern terminus is at U.S. Route 101 (US 101) near Leggett in Mendocino County. SR 1 also at times runs concurrently with US 101, most notably through a 54-mile (87 km) stretch in Ventura and Santa Barbara counties, and across the Golden Gate Bridge.

The highway is designated as an All-American Road. In addition to providing a scenic route to numerous attractions along the coast, the route also serves as a major thoroughfare in the Greater Los Angeles Area, the San Francisco Bay Area, and several other coastal urban areas. Though some maps and signs mark SR 1 as continuous through the cities of Dana Point, Newport Beach, Santa Monica, and Oxnard, control of segments within those cities were relinquished to those local jurisdictions and are thus no longer officially part of the state highway system. The Golden Gate Bridge is also officially not included in the state highway system because it is maintained locally by the Golden Gate Bridge, Highway and Transportation District.