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78-999: The Riverside Mountains are in the Colorado Desert , in the Lower Colorado River Valley region. They are southeast of the Turtle Mountains and north of the Big Maria Mountains , and the Colorado River borders its eastern perimeter. The high point of the range is 2,252 feet (686 m). The Riverside Mountains Wilderness was established in 1994 and is managed by the Bureau of Land Management . The Colorado River parallels this 24,004 acre wilderness on its eastern edge. The landscape varies from gently sloping bajadas to steep, rugged interiors. Washes emerging from canyons divide

156-473: A Caliph) on their way to Guerrero, Mexico where they played a future role in the wars of independence . Sebastián Vizcaíno explored and mapped the coast of California in 1602 for New Spain , putting ashore in Monterey . Despite the on-the-ground explorations of California in the 16th century, Rodríguez's idea of California as an island persisted. Such depictions appeared on many European maps well into

234-459: A Spanish navigator." The name most likely derived from the mythical island of California in the fictional story of Queen Calafia , as recorded in a 1510 work The Adventures of Esplandián by Garci Rodríguez de Montalvo . Queen Calafia's kingdom was said to be a remote land rich in gold and pearls, inhabited by beautiful Black women who wore gold armor and lived like Amazons , as well as griffins and other strange beasts. Abbreviations of

312-598: A commodity until the 1849 California Gold Rush . From the 1820s, trappers and settlers from the United States and Canada began to arrive in Northern California. These new arrivals used the Siskiyou Trail , California Trail , Oregon Trail and Old Spanish Trail to cross the rugged mountains and harsh deserts in and surrounding California. The early government of the newly independent Mexico

390-576: A free state, the "loitering or orphaned Indians", were de facto enslaved by their new Anglo-American masters under the 1850 Act for the Government and Protection of Indians . One of these de facto slave auctions was approved by the Los Angeles City Council and occurred for nearly twenty years. There were many massacres in which hundreds of indigenous people were killed by settlers for their land. Between 1850 and 1860,

468-624: A modest home which in the 1960s cost $ 25,000 would cost half a million dollars or more in urban areas by 2005. More people commuted longer hours to afford a home in more rural areas while earning larger salaries in the urban areas. Speculators bought houses, expecting to make a huge profit in months, then rolling it over by buying more properties. Mortgage companies were compliant, as people assumed prices would keep rising. The bubble burst in 2007–8 as prices began to crash. Hundreds of billions in property values vanished and foreclosures soared, as financial institutions and investors were badly hurt. In

546-469: A part of Mexico. In 1846, the total settler population of the western part of the old Alta California had been estimated to be no more than 8,000, plus about 100,000 Native Americans, down from about 300,000 before Hispanic settlement in 1769. In 1848, only one week before the official American annexation of the area, gold was discovered in California, this being an event which was to forever alter both

624-669: A result of the Miocene -age extension. The lower plate consists of a stack of metamorphosed units, which comprise Jurassic metavolcanics , the metamorphosed Grand Canyon sequence, the metamorphosed McCoy Mountains Formation and related Mesozoic rocks, and the Precambrian basement. The upper plate of the detachment fault consists of a small sedimentary basin containing Tertiary -age syntectonic (deposited during tectonic activity) volcanic units, conglomerates , and other sedimentary rocks . Colorado Desert Colorado Desert

702-748: A short break in 1862 when legislative sessions were held in San Francisco due to flooding in Sacramento . Once the state's Constitutional Convention had finalized its state constitution, it applied to the U.S. Congress for admission to statehood . On September 9, 1850, as part of the Compromise of 1850 , California became a free state and September   9 a state holiday . During the American Civil War (1861–1865), California sent gold shipments eastward to Washington in support of

780-767: A sinking of the terrain over time. The Colorado Desert's climate distinguishes it from other deserts. The region experiences greater summer daytime temperatures than higher-elevation deserts and almost never experiences frost. In addition, the Colorado Desert experiences two rainy seasons per year (in the winter and late summer), especially toward the southern portion of the region; the more northerly Mojave Desert usually has only winter rains. The west coast Peninsular Ranges, or other west ranges, of Southern California–northern Baja California , block most eastern Pacific coastal air and rains, producing an arid climate. Other short or longer-term weather events can move in from

858-734: A small part of San Bernardino County in California , United States, as well as the northern part of Mexicali Municipality in Baja California , Mexico. Most of the Colorado Desert lies at a relatively low elevation, below 1,000 ft (305 m), with the lowest point of the desert floor at 275 ft (84 m) below sea level , at the Salton Sea . Although the highest peaks of the Peninsular Ranges reach elevations of nearly 10,000 ft (3,048 m), most of

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936-612: A state Constitutional Convention was first held in Monterey. Among the first tasks of the convention was a decision on a location for the new state capital. The first full legislative sessions were held in San Jose (1850–1851). Subsequent locations included Vallejo (1852–1853), and nearby Benicia (1853–1854); these locations eventually proved to be inadequate as well. The capital has been located in Sacramento since 1854 with only

1014-621: Is Sacramento . The state's diverse geography ranges from the Pacific Coast and metropolitan areas in the west to the Sierra Nevada mountains in the east, and from the redwood and Douglas fir forests in the northwest to the Mojave Desert in the southeast. Two-thirds of the nation's earthquake risk lies in California. The Central Valley , a fertile agricultural area, dominates the state's center. The large size of

1092-566: Is a part of the larger Sonoran Desert located in California , United States, and Baja California , Mexico. It encompasses approximately 7 million acres (2,800,000 ha; 28,000 km ), including the heavily irrigated Coachella , Imperial and Mexicali valleys. It is home to many unique flora and fauna. The Colorado Desert is a subregion of the larger Sonoran Desert , covering about 7 million acres (2.8 million ha; 28,000 km ). The desert occupies Imperial County , parts of San Diego and Riverside counties, and

1170-630: Is at the wetland refuges along the Colorado River, Cibola National Wildlife Refuge and Imperial National Wildlife Refuge . In the Colorado Desert's arid environment, aquatic and wetland habitats are limited in extent but are critically important to wildlife. Runoff from seasonal rains and groundwater springs forms desert arroyos , desert fan palm oases , freshwater marshes , brine lakes, desert washes, ephemeral and perennial streams, and desert riparian vegetation communities dominated by cottonwood , willow , and non-native tamarisk . Two of

1248-526: Is the home of Hollywood , the oldest and one of the largest film industries in the world, profoundly influencing global entertainment. The San Francisco Bay and the Greater Los Angeles areas are seen as the centers of the global technology and U.S. film industries, respectively. The Spaniards gave the name Las Californias to the peninsula of Baja California (in modern-day Mexico). As Spanish explorers and settlers moved north and inland,

1326-504: The Battle of Providencia near Los Angeles, he convinced each side that they had no reason to be fighting each other. As a result of Marsh's actions, they abandoned the fight, Micheltorena was defeated, and California-born Pio Pico was returned to the governorship. This paved the way to California's ultimate acquisition by the United States. In 1846, a group of American settlers in and around Sonoma rebelled against Mexican rule during

1404-652: The Bear Flag Revolt . Afterward, rebels raised the Bear Flag (featuring a bear, a star, a red stripe and the words "California Republic") at Sonoma. The Republic's only president was William B. Ide , who played a pivotal role during the Bear Flag Revolt. This revolt by American settlers served as a prelude to the later American military invasion of California and was closely coordinated with nearby American military commanders. The California Republic

1482-715: The California Master Plan for Higher Education in 1960 to develop an efficient system of public education. Meanwhile, attracted to the mild Mediterranean climate, cheap land, and the state's variety of geography, filmmakers established the studio system in Hollywood in the 1920s. California manufactured 9% of US armaments produced during World War II , ranking third behind New York and Michigan . California easily ranked first in production of military ships at drydock facilities in San Diego, Los Angeles, and

1560-700: The Cretaceous . The structures of the MFTB are exposed by to later generally east–west-trending large-scale crustal extension in the Miocene , through what is known to geologists as the Colorado River Extensional Corridor . This north–south shortening is anomalous, as crustal shortening in the rest of the North American Cordillera is oriented generally east–west because of the generally east–west compression that

1638-566: The Graham Affair , which was resolved in part with the intercession of Royal Navy officials. One of the largest ranchers in California was John Marsh . After failing to obtain justice against squatters on his land from the Mexican courts, he determined that California should become part of the United States. Marsh conducted a letter-writing campaign espousing the California climate, the soil, and other reasons to settle there, as well as

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1716-638: The Gulf of California to the south, and are often active in the summer monsoons . These include remnants of Pacific hurricanes, storms from the southern tropical jetstream , and the northern Intertropical Convergence Zone . The region's terrestrial habitats include creosote bush scrub; mixed scrub , including yucca and cholla cactus ; desert saltbush ; sandy soil grasslands ; and desert dunes . Higher elevations are dominated by pinyon pine and California juniper , with areas of manzanita and Coulter pine . In addition to hardy perennials , more than half of

1794-553: The Indigenous people of California had not yet developed a natural immunity. Under its new American administration, California's first governor Peter Hardeman Burnett instituted policies that have been described as a state-sanctioned policy of elimination of California's indigenous people. Burnett announced in 1851 in his Second Annual Message to the Legislature: "That a war of extermination will continue to be waged between

1872-616: The Presidio of San Diego , the first religious and military settlements founded by the Spanish in California. By the end of the expedition in 1770, they would establish the Presidio of Monterey and Mission San Carlos Borromeo de Carmelo on Monterey Bay. After the Portolà expedition, Spanish missionaries led by Father-President Serra set out to establish 21 Spanish missions of California along El Camino Real ("The Royal Road") and along

1950-716: The Route 66 . From 1900 to 1965, the population grew from fewer than one million to the greatest in the Union. In 1940, the Census Bureau reported California's population as 6% Hispanic, 2.4% Asian, and 90% non-Hispanic white. To meet the population's needs, engineering feats like the California and Los Angeles Aqueducts ; the Oroville and Shasta Dams ; and the Bay and Golden Gate Bridges were built. The state government adopted

2028-527: The Treaty of Guadalupe Hidalgo (February 2, 1848) that ended the war, the westernmost portion of the annexed Mexican territory of Alta California soon became the American state of California, and the remainder of the old territory was then subdivided into the new American Territories of Arizona, Nevada, Colorado and Utah . The even more lightly populated and arid lower region of old Baja California remained as

2106-673: The coast of California were the members of a Spanish maritime expedition led by Portuguese captain Juan Rodríguez Cabrillo in 1542. Cabrillo was commissioned by Antonio de Mendoza , the Viceroy of New Spain , to lead an expedition up the Pacific coast in search of trade opportunities; they entered San Diego Bay on September 28, 1542, and reached at least as far north as San Miguel Island . Privateer and explorer Francis Drake explored and claimed an undefined portion of

2184-513: The 18th century. The Portolá expedition of 1769–70 was a pivotal event in the Spanish colonization of California, resulting in the establishment of numerous missions, presidios , and pueblos . The military and civil contingent of the expedition was led by Gaspar de Portolá , who traveled over land from Sonora into California, while the religious component was headed by Junípero Serra , who came by sea from Baja California . In 1769, Portolá and Serra established Mission San Diego de Alcalá and

2262-491: The 1992 Rodney King riots. California was the hub of the Black Panther Party , known for arming African Americans to defend against racial injustice. Mexican, Filipino, and other migrant farm workers rallied in the state around Cesar Chavez for better pay in the 1960s and 70s. During the 20th century, two great disasters happened: the 1906 San Francisco earthquake and 1928 St. Francis Dam flood remain

2340-403: The 21st century, droughts and frequent wildfires attributed to climate change have occurred. From 2011 to 2017, a persistent drought was the worst in its recorded history. The 2018 wildfire season was the state's deadliest and most destructive. One of the first confirmed COVID-19 cases in the United States occurred in California on January 26, 2020. A state of emergency was declared in

2418-522: The California coast in 1579, landing north of the future city of San Francisco . The first Asians to set foot on what would be the United States occurred in 1587, when Filipino sailors arrived in Spanish ships at Morro Bay . Coincidentally the descendants of the Muslim Caliph Hasan ibn Ali in formerly Islamic Manila and had converted, then mixed Christianity with Islam, upon Spanish conquest, transited through California (Named after

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2496-526: The California coast, 16 sites of which having been chosen during the Portolá expedition. Numerous major cities in California grew out of missions, including San Francisco ( Mission San Francisco de Asís ), San Diego ( Mission San Diego de Alcalá ), Ventura ( Mission San Buenaventura ), or Santa Barbara ( Mission Santa Barbara ), among others. Juan Bautista de Anza led a similarly important expedition throughout California in 1775–76, which would extend deeper into

2574-534: The California government in 2022. These groups were also diverse in their political organization, with bands, tribes, villages, and, on the resource-rich coasts, large chiefdoms , such as the Chumash , Pomo and Salinan . Trade, intermarriage, craft specialists, and military alliances fostered social and economic relationships between many groups. Although nations would sometimes war, most armed conflicts were between groups of men for vengeance . Acquiring territory

2652-443: The California state government paid around 1.5   million dollars (some 250,000 of which was reimbursed by the federal government) to hire militias with the stated purpose of protecting settlers, however these militias perpetrated numerous massacres of indigenous people. Indigenous people were also forcibly moved to reservations and rancherias, which were often small and isolated and without enough natural resources or funding from

2730-692: The Colorado Desert. They occur only where permanent water sources are available, such as at springs or along fault lines, where groundwater is forced to the surface by the movement of hard impermeable rock, and can be found in the San Jacinto, Santa Rosa, and Little San Bernardino mountains, in the canyons of Anza-Borrego Desert State Park , and along the San Andreas Fault in the Coachella Valley . The only palm native to California, Washingtonia filifera (desert fan palm), grows at

2808-624: The San Francisco Bay Area. Due to the hiring opportunities California offered during the conflict, the population multiplied from the immigration it received due to the work in its war factories, military bases, and training facilities. After World War II, California's economy expanded due to strong aerospace and defense industries, whose size decreased following the end of the Cold War . Stanford University began encouraging faculty and graduates to stay instead of leaving

2886-497: The U.S. Army. In the 20th century, thousands of Japanese people migrated to California. The state in 1913 passed the Alien Land Act , excluding Asian immigrants from owning land. During World War II, Japanese Americans in California were interned in concentration camps; in 2020, California apologized. Migration to California accelerated during the early 20th century with the completion of transcontinental highways like

2964-454: The Union . However, due to the existence of a large contingent of pro-South sympathizers within the state, the state was not able to muster any full military regiments to send eastwards to officially serve in the Union war effort. Still, several smaller military units within the Union army, such as the "California 100 Company" , were unofficially associated with the state of California due to a majority of their members being from California. At

3042-721: The bajadas below. Numerous peaks in the Riverside Mountains give this small range a rough, craggy appearance. Two sensitive plant species, the foxtail cactus and California barrel cactus ; and a small herd of Burro deer ( Odocoileus hemionus eremicus ) live in the Riverside range. The Riverside Mountains are one of several ranges that constitute the Maria Fold and Thrust Belt (MFTB). The Maria Fold and Thrust Belt underwent generally thick-skinned (involving basement rocks ) north–south-trending crustal shortening in

3120-454: The best land in the state, were secularized by 1834 and became the property of the Mexican government. The governor granted many square leagues of land to others with political influence. These huge ranchos or cattle ranches emerged as the dominant institutions of Mexican California. The ranchos developed under ownership by Californios (Hispanics native of California) who traded cowhides and tallow with Boston merchants. Beef did not become

3198-464: The best route to follow, which became known as "Marsh's route". His letters were read, reread, passed around, and printed in newspapers throughout the country, and started the first wagon trains rolling to California. After ushering in the period of organized emigration to California, Marsh became involved in a military battle between the much-hated Mexican general, Manuel Micheltorena and the California governor he had replaced, Juan Bautista Alvarado. At

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3276-551: The conquest include the Battle of San Pasqual and the Battle of Dominguez Rancho in Southern California, as well as the Battle of Olómpali and the Battle of Santa Clara in Northern California. After a series of defensive battles in the south, the Treaty of Cahuenga was signed by the Californios on January 13, 1847, securing a censure and establishing de facto American control in California. Following

3354-535: The deadliest in U.S. history. Although air pollution has been reduced, health problems associated with pollution continue. Brown haze known as " smog " has been substantially abated after federal and state restrictions on automobile exhaust. An energy crisis in 2001 led to rolling blackouts , soaring power rates, and the importation of electricity from neighboring states. Southern California Edison and Pacific Gas and Electric Company came under heavy criticism. Housing prices in urban areas continued to increase;

3432-759: The desert's plant species are herbaceous annuals, and appropriately timed winter rains produce abundant early spring wildflowers. In the southern portion of the region, the additional moisture supplied by summer rainfall fosters the germination of summer annual plants and supports smoketree , ironwood , and palo verde trees. Common desert wildlife include mule deer , bobcat , desert kangaroo rat , cactus mouse , black-tailed jackrabbit , Gambel's quail , and red-diamond rattlesnake . Among sensitive species are flat-tailed horned lizard , Coachella Valley fringe-toed lizard, desert tortoise , prairie falcon , Andrews' dune scarab beetle , peninsular bighorn sheep , and California leaf-nosed bat . The best place to spot wildlife

3510-626: The government to adequately sustain the populations living on them. As a result, settler colonialism was a calamity for indigenous people. Several scholars and Native American activists, including Benjamin Madley and Ed Castillo , have described the actions of the California government as a genocide , as well as the 40th governor of California Gavin Newsom . Benjamin Madley estimates that from 1846 to 1873, between 9,492 and 16,092 indigenous people were killed, including between 1,680 and 3,741 killed by

3588-459: The highest output of any U.S. state, and is led by its dairy , almonds , and grapes . With the busiest port in the country ( Los Angeles ), California plays a pivotal role in the global supply chain, hauling in about 40% of goods imported to the US. Notable contributions to popular culture , ranging from entertainment , sports , music , and fashion , have their origins in California. California

3666-410: The indigenous peoples developed complex forms of ecosystem management, including forest gardening to ensure the regular availability of food and medicinal plants . This was a form of sustainable agriculture . To mitigate destructive large wildfires from ravaging the natural environment, indigenous peoples developed a practice of controlled burning . This practice was recognized for its benefits by

3744-572: The interior and north of California. The Anza expedition selected numerous sites for missions, presidios, and pueblos, which subsequently would be established by settlers. Gabriel Moraga , a member of the expedition, would also christen many of California's prominent rivers with their names in 1775–1776, such as the Sacramento River and the San Joaquin River . After the expedition, Gabriel's son, José Joaquín Moraga , would found

3822-531: The largest dam removal and river restoration project in US history was announced for the Klamath River , as a win for California tribes. Covering an area of 163,696 sq mi (423,970 km ), California is the third-largest state in the United States in area, after Alaska and Texas . California is one of the most geographically diverse states in the union and is often geographically bisected into two regions, Southern California , comprising

3900-844: The middle of the state lies the California Central Valley , bounded by the Sierra Nevada in the east, the coastal mountain ranges in the west, the Cascade Range to the north and by the Tehachapi Mountains in the south. The Central Valley is California's productive agricultural heartland. Divided in two by the Sacramento-San Joaquin River Delta , the northern portion, the Sacramento Valley serves as

3978-533: The north, Nevada and Arizona to the east, and shares an international border with the Mexican state of Baja California to the south. With nearly 39   million residents across an area of 163,696 square miles (423,970 km ), it is the most populous U.S. state, the third-largest by area, and most populated subnational entity in North America . Prior to European colonization , California

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4056-474: The oases. Some sub-regions of the Colorado Desert contain endemic flora. Along the Lower Colorado River Valley , in-flow side canyons, flatlands, or low-to-higher level elevations, at least three such flora occur: Hesperocallis undulata (desert lily), Nolina bigelovii (Bigelow's nolina), and Peucephyllum schottii (desert fir). The Colorado Desert is one of the least-populous regions in California, but human activities have had substantial impacts on

4134-414: The population of San Francisco increased from 500 to 150,000. The seat of government for California under Spanish and later Mexican rule had been located in Monterey from 1777 until 1845. Pio Pico, the last Mexican governor of Alta California, had briefly moved the capital to Los Angeles in 1845. The United States consulate had also been located in Monterey, under consul Thomas O. Larkin . In 1849,

4212-733: The pueblo of San Jose in 1777, making it the first civilian-established city in California. During this same period, sailors from the Russian Empire explored along the northern coast of California. In 1812, the Russian-American Company established a trading post and small fortification at Fort Ross on the North Coast . Fort Ross was primarily used to supply Russia's Alaskan colonies with food supplies. The settlement did not meet much success, failing to attract settlers or establish long term trade viability, and

4290-469: The races until the Indian race becomes extinct must be expected. While we cannot anticipate the result with but painful regret, the inevitable destiny of the race is beyond the power and wisdom of man to avert." As in other American states, indigenous peoples were forcibly removed from their lands by American settlers , like miners, ranchers, and farmers. Although California had entered the American union as

4368-403: The region known as California , or Las Californias , grew. Eventually it included lands north of the peninsula, Alta California , part of which became the present-day U.S. state of California. A 2017 state legislative document states, "Numerous theories exist as to the origin and meaning of the word 'California, ' " and that all anyone knows is the name was added to a map by 1541 "presumably by

4446-425: The region's habitats and wildlife. Many unique communities, particularly aquatic and dune systems, are limited in distribution and separated by vast expanses of inhospitable, arid desert terrain. Even limited human disturbances can have markedly deleterious effects on the endemic and sensitive species supported by these unique regional systems. Some of the greatest human-caused effects on the region have resulted from

4524-507: The region's most significant aquatic systems are the Salton Sea and the Colorado River . While most desert wildlife depend on aquatic habitats as water sources, a number of species, such as the arroyo toad , desert pupfish , Yuma rail , and southwestern willow flycatcher , are restricted to these habitats. In some places, summer rains produce short-lived seasonal pools that host uncommon species like Couch's spadefoot toad . Desert fan palm oases are rare ecological communities found only in

4602-479: The region's mountains do not exceed 3,000 ft (914 m). In this region, the geology is dominated by the transition of the tectonic plate boundary from rift to fault . The southernmost strands of the San Andreas Fault connect to the northernmost extensions of the East Pacific Rise . Consequently, the region is subject to earthquakes , and the crust is being stretched, which will result in

4680-569: The scarcity of water resources in the desert environment, these alterations have had substantial impacts on regional wildlife and habitats. In addition, portions of the region are experiencing substantial growth and development pressures, most notably the Coachella Valley . California California is a state in the Western United States , lying on the American Pacific Coast . It borders Oregon to

4758-654: The state as part of the Gold Rush or to seek work. Even though the Chinese proved indispensable in building the transcontinental railroad from California to Utah, perceived job competition with the Chinese led to anti-Chinese riots in the state, and eventually the US ended migration from China partially as a response to pressure from California with the 1882 Chinese Exclusion Act . Under earlier Spanish and Mexican rule, California's original native population had precipitously declined, above all, from Eurasian diseases to which

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4836-521: The state on March 4, 2020, and remained in effect until Governor Gavin Newsom ended it in February 2023. A mandatory statewide stay-at-home order was issued on March 19, 2020, which was ended in January 2021. Cultural and language revitalization efforts among indigenous Californians have progressed among tribes as of 2022. Some land returns to indigenous stewardship have occurred. In 2022,

4914-430: The state results in climates that vary from moist temperate rainforest in the north to arid desert in the interior, as well as snowy alpine in the mountains . Droughts and wildfires are an ongoing issue. California's economy is the largest of any U.S. state, with a $ 4.0 trillion gross state product as of 2024 . It is the largest sub-national economy in the world. California's agricultural industry has

4992-515: The state's demographics and its finances. Soon afterward, a massive influx of immigration into the area resulted, as prospectors and miners arrived by the thousands. The population burgeoned with United States citizens, Europeans, Middle Easterns, Chinese and other immigrants during the great California gold rush . By the time of California's application for statehood in 1850, the settler population of California had multiplied to 100,000. By 1854, more than 300,000 settlers had come. Between 1847 and 1870,

5070-522: The state's name include CA, Cal., Calif., Califas , and US-CA . California was one of the most culturally and linguistically diverse areas in pre-Columbian North America . Historians generally agree that there were at least 300,000 people living in California prior to European colonization. The Indigenous peoples of California included more than 70 distinct ethnic groups , inhabiting environments ranging from mountains and deserts to islands and redwood forests. Living in these diverse geographic areas,

5148-560: The state, and develop a high-tech region, now known as Silicon Valley . As a result of this, California is a world center of the entertainment and music industries, of technology, engineering, and the aerospace industry, and as the US center of agricultural production. Just before the Dot Com Bust , California had the fifth-largest economy in the world. In the mid and late twentieth century, race-related incidents occurred. Tensions between police and African Americans, combined with unemployment and poverty in inner cities, led to riots, such as

5226-449: The ten southernmost counties, and Northern California , comprising the 48 northernmost counties. It is bordered by Oregon to the north, Nevada to the east and northeast, Arizona to the southeast, the Pacific Ocean to the west and shares an international border with the Mexican state of Baja California to the south (with which it makes up part of The Californias region of North America , alongside Baja California Sur ). In

5304-407: The time of California's admission into the Union, travel between California and the rest of the continental United States had been a time-consuming and dangerous feat. Nineteen years later, and seven years after it was greenlighted by President Lincoln, the first transcontinental railroad was completed in 1869. California was then reachable from the eastern States in a week's time. Much of the state

5382-448: The transition from Spanish colonial rule to independent Mexican rule. In 1821, the Mexican War of Independence gave the Mexican Empire (which included California) independence from Spain. For the next 25 years, Alta California remained a remote, sparsely populated, northwestern administrative district of the newly independent country of Mexico, which shortly after independence became a republic. The missions , which controlled most of

5460-417: The water diversions and flood control measures along the Colorado River . These measures have dramatically altered the region's hydrology by redistributing the region's water supply to large expanses of irrigated agriculture and metropolitan coastal areas such as Los Angeles and San Diego . The once-dynamic Salton Sea and Colorado River ecosystems are now controlled by human water management. Because of

5538-496: Was abandoned by 1841. During the War of Mexican Independence , Alta California was largely unaffected and uninvolved in the revolution, though many Californios supported independence from Spain , which many believed had neglected California and limited its development. Spain's trade monopoly on California had limited local trade prospects. Following Mexican independence, California ports were freely able to trade with foreign merchants. Governor Pablo Vicente de Solá presided over

5616-762: Was due to the subduction of the Farallon plate under western North America. Also unlike the rest of the North American Cordillera, deformation in the Maria Fold and Thrust Belt involved rocks of the North American Craton , most notably the Grand Canyon sequence of sedimentary rocks. The Riverside Mountains contain rocks from both the lower and upper plates of a large detachment fault and metamorphic core complex system as

5694-552: Was extremely well suited to fruit cultivation and agriculture in general. Vast expanses of wheat, other cereal crops, vegetable crops, cotton, and nut and fruit trees were grown (including oranges in Southern California), and the foundation was laid for the state's prodigious agricultural production in the Central Valley and elsewhere. In the nineteenth century, a large number of migrants from China traveled to

5772-607: Was highly unstable, and in a reflection of this, from 1831 onwards, California also experienced a series of armed disputes, both internal and with the central Mexican government. During this tumultuous political period Juan Bautista Alvarado was able to secure the governorship during 1836–1842. The military action which first brought Alvarado to power had momentarily declared California to be an independent state, and had been aided by Anglo-American residents of California, including Isaac Graham . In 1840, one hundred of those residents who did not have passports were arrested, leading to

5850-714: Was not usually the purpose of these small-scale battles. Men and women generally had different roles in society. Women were often responsible for weaving, harvesting, processing, and preparing food, while men for hunting and other forms of physical labor. Most societies also had roles for people whom the Spanish referred to as joyas , who they saw as "men who dressed as women". Joyas were responsible for death , burial , and mourning rituals , and they performed women's social roles. Indigenous societies had terms such as two-spirit to refer to them. The Chumash referred to them as 'aqi. The early Spanish settlers detested and sought to eliminate them. The first Europeans to explore

5928-666: Was one of the most culturally and linguistically diverse areas in pre-Columbian North America . European exploration in the 16th and 17th centuries led to the colonization by the Spanish Empire . The area became a part of Mexico in 1821, following its successful war for independence , but was ceded to the United States in 1848 after the Mexican–American War . The California gold rush started in 1848 and led to social and demographic changes, including depopulation of Indigenous tribes. The western portion of Alta California

6006-502: Was short-lived; the same year marked the outbreak of the Mexican–American War (1846–1848). Commodore John D. Sloat of the United States Navy sailed into Monterey Bay in 1846 and began the U.S. military invasion of California , with Northern California capitulating in less than a month to the United States forces. In Southern California, Californios continued to resist American forces. Notable military engagements of

6084-399: Was then organized and admitted as the 31st state in 1850 , as a free state , following the Compromise of 1850 . The Greater Los Angeles and San Francisco Bay areas are the nation's second- and fifth-most populous urban regions , with 19 million and 10 million residents respectively. Los Angeles is the state's most populous city and the nation's second-most ; California's capital

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