A report on Southern California, Orange County, California and Interstate 5 in California

I-5 looking south toward Downtown San Diego, January 2002

I-5 southbound in San Diego toward Mexico, September 2012

Sunset in Venice, a neighborhood in Los Angeles

Laguna Beach (with Newport beach in background).

I-5 crosses the Los Angeles River twice; the northern of these is on the border between Los Angeles and Glendale

Los Angeles County before the secession of Orange County in 1889

I-5 northbound prior to entering the Newhall Pass Interchange

California counties below the 36th standard parallel

A billboard for Nixon's Restaurant in Orange County, circa 1955

I-5 in the Newhall Pass Interchange, where it meets I-210 and SR 14 in northern Los Angeles

One of the few remaining farms near the ocean, 1975. Photo by Charles O'Rear.

I-5 in the Central Valley, looking south near Derrick Avenue in Fresno County

Percent of households with incomes above $150k across LA County census tracts.

Three Arch Bay in Laguna Beach, Southern Orange County

I-5 in the Central Valley between Tracy and Patterson

Köppen climate types of southern California

View of Newport Center and the Santa Ana Mountains from Newport Harbor

I-5 southbound approaching Weed and Mount Shasta

Aerial view of an edge city: Irvine Business Complex (top), John Wayne Airport runway (upper center), South Coast Metro buildings (lower center) and below, the South Coast Plaza mall

View of the Grapevine loops looking north toward the San Joaquin Valley c. 1920, before the Ridge Route Alternate was built off to the left

Huntington Beach and Fountain Valley from over Costa Mesa

A section of the 1915 Ridge Route in Lebec, abandoned when US 99 (later upgraded to I-5) was constructed over the Tejon Pass in order to make the travel straighter and safer

Satellite view of southern California, including the Channel Islands

Major facilities in the Anaheim–Santa Ana edge city, plus the locations of the adjacent downtowns

Peaks in the eastern San Gabriel Mountains, Angeles National Forest, San Bernardino County.

Orange County Density Map. Darker shades indicate more densely populated areas.

Yucca Valley with Visitor Center in Background in June 2017.

The developing urban core in the City of Irvine.

State Route 1 winds down the coast over Corona Del Mar State Beach

Anaheim Regional Transportation Intermodal Center (ARTIC)

The Oceanside Pier on the San Diego County coast

Santa Ana Regional Transportation Center

1965 aerial photo of Anaheim Disneyland, Disneyland Hotel with its Monorail Station. The Disneyland Heliport, surrounding orange groves, Santa Ana Freeway (now I-5) and the Melodyland Theater "in the round," and part of the City of Anaheim. Anaheim Stadium can be seen under construction near the upper left.

Street banners promoting the county's two major league teams, the Ducks and the Angels.

Interstate and state highway system of Southern California

The Atchison, Topeka and Santa Fe Railway's combined Super Chief-El Capitan pulls into Los Angeles's Union Passenger Terminal on September 24, 1966.

Blooming Roses at Huntington Library in San Marino, Los Angeles County, April 2022

Orange County is located in the Los Angeles metropolitan area in Southern California.

- Orange County, California

The region generally contains ten of California's 58 counties: Imperial, Kern, Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara, San Luis Obispo and Ventura counties.

- Southern California

I-5 is known colloquially as "the 5" to Southern California residents and "5" to Northern California residents due to varieties in California English.

- Interstate 5 in California

I-5 enters Orange County at the Cristianitos Road exit.

- Interstate 5 in California

Transportation further improved with the completion of the State Route and U.S. Route 101 (now mostly Interstate 5) in the 1920s.

- Orange County, California

Travelling south on Interstate 5, the main barrier to continued urbanization is Camp Pendleton.

- Southern California

2 related topics with Alpha

Greater Los Angeles

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Greater Los Angeles in yellow and peach; urbanized areas in gray; Los Angeles proper lined in blue; Los Angeles metropolitan area lined in red.

Many areas are completely filled with houses, buildings, roads, and freeways as observed in Vermont Vista, a Los Angeles neighborhood.

Aerial view of Newport Beach in Orange County

Sleeping Beauty Castle at Disneyland Park

Laguna Beach coastline is popular for sunbathers

Warner Brothers Studios in the San Fernando Valley

Cal State LA's The Golden Eagle, consisting of two adjoining structures separated by a promenade.

Rush hour on the Harbor Freeway, Downtown

UCLA–USC rivalry, both universities are located in Los Angeles and are members of the Pac-12 Conference. The rivalry between the two is among the more unusual in National Collegiate Athletic Association (NCAA) Division I sports, because the campuses are only 12 miles (19 km) apart, and both are located within the same megacity.

Greater Los Angeles is the second-largest metropolitan region in the United States with a population of 18.5 million as of 2021, encompassing five counties in southern California extending from Ventura County in the west to San Bernardino County and Riverside County in the east, with Los Angeles County in the center and Orange County to the southeast.

Orange County was originally an agricultural area dependent on citrus crops, avocados, and oil extraction, and became a bedroom community for Los Angeles when I–5, the Santa Ana Freeway, linked it to the city in the 1950s.

San Diego

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Major city in the U.S. state of California on the coast of the Pacific Ocean and immediately adjacent to the Mexican border.

The Kumeyaay, also known as the Diegueño, have inhabited the area of San Diego for thousands of years.

San Diego's namesake is the 15th-century Spanish saint Didacus of Alcalá.

José María Estudillo served as commandant of the Presidio of San Diego and founded the Estudillo family, a powerful San Diego clan of Californios.

The 1846 Battle of San Pasqual was a decisive battle between American and Californio forces during the U.S. Conquest of California.

The namesake of Horton Plaza, Alonzo Horton developed "New Town," which became Downtown San Diego.

Balboa Park on the cover of a guidebook for the World Exposition of 1915

Satellite view of San Diego and Tijuana, Mexico

Mission Valley facing Northwest, taken from Arista Street. Mission Bay can be seen in the distance.

Normal Heights, a neighborhood of San Diego

Coastal canyon in Torrey Pines State Reserve

San Diego viewed against the Witch Creek Fire smoke

Map of racial distribution in San Diego, 2010 U.S. Census. Each dot is 25 people:

A U.S. Navy vice admiral and an intelligence specialist celebrating Hispanic American Heritage Month in San Diego

F/A-18 Hornet flying over San Diego and the USS John C. Stennis

Downtown San Diego, as seen from Coronado Island

San Diego Police Department car in the city center

San Diego State University's Hepner Hall

University of California, San Diego's Geisel Library, named for Theodor Seuss Geisel ("Dr. Seuss")

Petco Park, home of the Padres since 2004

I-5 looking south toward downtown San Diego

View of Coronado and San Diego from the air

Cross Border Xpress bridge from the terminal in San Diego on the right to the main terminal of Tijuana Airport on the left

Like much of Southern California, the majority of San Diego's current area was originally occupied on the west by coastal sage scrub and on the east by chaparral, plant communities made up mostly of drought-resistant shrubs.

The Imperial Valley, including El Centro, is in the Yuma, Arizona television market while neighboring Orange and Riverside counties are part of the Los Angeles market.

This includes Interstate 5, which runs south to Tijuana and north to Los Angeles; Interstate 8, which runs east to Imperial County and the Arizona Sun Corridor; Interstate 15, which runs northeast through the Inland Empire to Las Vegas and Salt Lake City; and Interstate 805, which splits from I-5 near the Mexican border and rejoins I-5 at Sorrento Valley.