San Bernardino County in the context of "Southern California"

Greater Los Angeles is the most populous metropolitan area in the U.S. state of California, encompassing five counties in Southern California extending from Ventura County in the west to San Bernardino County and Riverside County in the east, with the city of Los Angeles and Los Angeles County at its center, and Orange County to the southeast. The Los Angeles–Long Beach combined statistical area (CSA) covers 33,954 square miles (87,940 km), making it the largest metropolitan region in the United States by land area. The contiguous urban area is 2,281 square miles (5,910 km), whereas the remainder mostly consists of mountain and desert areas. With an estimated population of over 18.3 million (U.S. Census Bureau, 2023), it is the second-largest metropolitan area in the country, behind New York, as well as one of the largest megacities in the world.

In addition to being the nexus of the global entertainment industry, including films, television, and recorded music, Greater Los Angeles is also an important center of international trade, education, media, business, tourism, technology, and sports. It is the third-largest metropolitan area by nominal GDP in the world with an economy exceeding $1 trillion in output, behind New York City and Tokyo.

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.

The San Gabriel Mountains (Spanish: Sierra de San Gabriel) are a mountain range located in Los Angeles and San Bernardino counties, California, United States. The mountain range is part of the Transverse Ranges and lies between the Los Angeles Basin and the Mojave Desert, with Interstate 5 to the west and Interstate 15 to the east. The range lies in, and is surrounded by, the Angeles and San Bernardino National Forests, with the San Andreas Fault as its northern border.

The highest peak in the range is Mount San Antonio, commonly referred to as Mt. Baldy. Mount Wilson is another notable peak, known for the Mount Wilson Observatory and the antenna farm that houses many of the transmitters for local media. The observatory may be visited by the public. On October 10, 2014, President Barack Obama designated the area the San Gabriel Mountains National Monument. The Trust for Public Land has protected more than 3,800 acres (1,500 ha) of land in the San Gabriel Mountains, its foothills, and the Angeles National Forest. The mountains were once known as the Sierra Madre, lending the name to the city of Sierra Madre; however, since 1965, the name "Sierra Madre" has referred to a different mountain range to the west in Santa Barbara County.

Clinoptilolite is a natural zeolite composed of a microporous arrangement of silica and alumina tetrahedra. It has the complex formula (Na,K,Ca)
_2–3Al
₃(Al,Si)
₂Si
₁₃O
₃₆•12H
₂O. It forms as white, green to reddish tabular monoclinic tectosilicate crystals with a Mohs hardness of 3.5 to 4 and a specific gravity of 2.1 to 2.2. It commonly occurs as a devitrification product of volcanic glass shards in tuff and as vesicle fillings in basalts, andesites and rhyolites. It was described in 1969 from an occurrence in the Barstow Formation, San Bernardino County, California. Sodium levels in clinoptilolite are generally higher than potassium levels, as is the case with the San Bernardino Barstow Formation, but there are sources that are potassium-rich and have minimal sodium.

It forms a series with heulandite:

Downtown San Bernardino is a neighborhood in the city of San Bernardino, California, in San Bernardino County, United States. It is home to city and county government buildings, and to the city's central business district. The downtown area of San Bernardino is home to multiple (and the only) diplomatic missions for the Inland Empire, being one of only four California cities with multiple consulates (the other cities being Los Angeles, San Diego, and San Francisco). The governments of Guatemala (opened July 2014) and Mexico have established their consulates in the civic center. Downtown San Bernardino is bounded by I-215 to the west, Waterman Avenue to the east, Baseline Street to the north, and Mill Street to the south.

The San Bernardino City Council has initiated several redevelopment efforts. The city's Economic Development Agency presented the council with a draft of the Downtown Core Vision / Action Plan in 2009, created in partnership with the urban planning firm EDAW, as a guide for revitalizing downtown San Bernardino over the next 10 years. The city has also discussed the construction of a new government center/civic plaza that will contain an iconic 24-story tower. On May 11, 2014 the county of San Bernardino opened a 12-story, 200-foot-tall courthouse known as the San Bernardino Justice Center. The county is consolidating many county-wide court functions into the new structure, which is the tallest building in San Bernardino.