Rancho San Joaquin, the combined Rancho Cienega de las Ranas and Rancho Bolsa de San Joaquin, was a 48803 acres (197.5 km²) Mexican land grant

Ranchos of California

The Spanish, and later the Méxican government encouraged settlement of territory now known as California by the establishment of large land grants called ranchos, from which the English ranch is derived. Devoted to raising cattle and sheep, the owners of the ranchos attempted to pattern themselves...

 in present day Orange County

Orange County, California

Orange County is a county in the U.S. state of California. Its county seat is Santa Ana. As of the 2010 census, its population was 3,010,232, up from 2,846,293 at the 2000 census, making it the third most populous county in California, behind Los Angeles County and San Diego County...

, California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

 given to José Antonio Andres Sepúlveda. In Spanish

Spanish language

Spanish , also known as Castilian , is a Romance language in the Ibero-Romance group that evolved from several languages and dialects in central-northern Iberia around the 9th century and gradually spread with the expansion of the Kingdom of Castile into central and southern Iberia during the...

 Cienega de las Ranas means "Marsh

Marsh

In geography, a marsh, or morass, is a type of wetland that is subject to frequent or continuous flood. Typically the water is shallow and features grasses, rushes, reeds, typhas, sedges, other herbaceous plants, and moss....

 of the Frogs" and Bolsa means "Pocket", and usually in reference to wetland

Wetland

A wetland is an area of land whose soil is saturated with water either permanently or seasonally. Wetlands are categorised by their characteristic vegetation, which is adapted to these unique soil conditions....

s landforms.

History

Rancho Cienega de las Ranas was granted to José Sepúlveda (1803 - 1875) by Mexican Alta California

Alta California

Alta California was a province and territory in the Viceroyalty of New Spain and later a territory and department in independent Mexico. The territory was created in 1769 out of the northern part of the former province of Las Californias, and consisted of the modern American states of California,...

 Governor Juan Bautista Alvarado

Juan Bautista Alvarado

Juan Bautista Valentín Alvarado y Vallejo was a Californio and twice Governor of Alta California from 1836 to 1837, and 1838 to 1842.-Early years:...

 in 1837. Rancho Cienega de las Ranas encompassed present day Irvine

Irvine, California

Irvine is a suburban incorporated city in Orange County, California, United States. It is a planned city, mainly developed by the Irvine Company since the 1960s. Formally incorporated on December 28, 1971, the city has a population of 212,375 as of the 2010 census. However, the California...

 and the San Joaquin Hills

San Joaquin Hills

The San Joaquin Hills are a set of low hills in coastal Orange County, California. They extend in a northwest-southeast direction, starting in the northwest in Newport Beach at the southern edge of the Los Angeles Basin, and extending southeast to San Juan Capistrano.-Geography and habitats:Named...

. Additional land, Rancho La Bolsa de San Joaquín, was granted to Sepúlveda in 1842. Rancho Bolsa de San Joaquin encompassed Newport Bay

Upper Newport Bay

The Upper Newport Bay is a large coastal wetland in Southern California and a major stopover for birds. Dozens of species, including endangered ones, can be observed here. Upper Newport Bay Nature Preserve and Ecological Reserve represent approximately 1,000 acres of open space...

 and estuary

Estuary

An estuary is a partly enclosed coastal body of water with one or more rivers or streams flowing into it, and with a free connection to the open sea....

 in present day Newport Beach

Newport Beach, California

Newport Beach, incorporated in 1906, is a city in Orange County, California, south of downtown Santa Ana. The population was 85,186 at the 2010 census.The city's median family income and property values consistently place high in national rankings...

 southeast to Laguna Canyon Creek flowing to present day Laguna Beach

Laguna Beach, California

Laguna Beach is a seaside resort city and artist community located in southern Orange County, California, United States, approximately southwest of the county seat of Santa Ana...

. Together these two ranchos formed Rancho San Joaquín.

With the cession

Mexican Cession

The Mexican Cession of 1848 is a historical name in the United States for the region of the present day southwestern United States that Mexico ceded to the U.S...

 of California to the United States following the Mexican-American War, the 1848 Treaty of Guadalupe Hidalgo

Treaty of Guadalupe Hidalgo

The Treaty of Guadalupe Hidalgo is the peace treaty, largely dictated by the United States to the interim government of a militarily occupied Mexico City, that ended the Mexican-American War on February 2, 1848...

 provided that the land grants would be honored. As required by the Land Act of 1851, a claim for Rancho San Joaquin was filed with the Public Land Commission

Public Land Commission

The Public Land Commission, a former agency of the United States government, was created following the admission of California as a state in 1850 . The Commission's purpose was to determine the validity of prior Spanish and Mexican land grants in California.California Senator William M...

 in 1852, and the grant was patented

Land patent

A land patent is a land grant made patent by the sovereign lord over the land in question. To make a such a grant “patent”, such a sovereign lord must document the land grant, securely sign and seal the document and openly publish the same to the public for all to see...

 to José Sepulveda in 1867.

Following the drought in 1864, José Andrés Sepúlveda sold Rancho San Joaquin to Benjamin and Thomas Flint, Llewellyn Bixby and James Irvine

James Irvine (landowner)

The Irvine family were agricultural pioneers and prominent landowners in California who gave their name to the city of Irvine, CA.-James Irvine I:James Irvine was born in County Down, Ireland on December 27, 1827, the second to the youngest of nine children...

, and it eventually became part of the Irvine Ranch.