Riven Rock is a residential subdivision in the unincorporated area of Montecito, California near Santa Barbara, California. The Riven Rock subdivision is located on the former Riven Rock Estate.
The Riven Rock Estate was owned by the McCormick family, who purchased the 84 acre property in 1896 and in 1898 built a large two-story Mission Revival home on the premises. The estate's name came from an oak tree near the main gate, which was growing out of and had split a large boulder.  It was where Stanley McCormick, the youngest child of Cyrus Hall McCormick and Nancy Fowler McCormick, and husband of Katharine McCormick, was confined for much of his life as he suffered from schizophrenia. 
After the 1925 Santa Barbara earthquake the main house was demolished. After Stanley McCormick's death in 1947, Katharine sold the estate in 1949 to one real estate developer, who sold it to another developer in 1950. The second one subdivided the estate into 34 smaller parcels and put them up for sale. 
Stanely McCormick's life was the basis of T.C. Boyle's 1998 novel Riven Rock . 
In 2020, Meghan, Duchess of Sussex and Prince Harry, Duke of Sussex, after deciding to withdraw from royal family duties, purchased the French Provençal "Chateau of Riven Rock", which is located on the grounds of the old Riven Rock Estate. The seven-acre, 18,671-square-foot residence was purchased from the Russian oligarch Sergey Grishin for $14.6 million.  
Montecito is an unincorporated town and census-designated place in Santa Barbara County, California, United States. Located on the Central Coast of California, Montecito sits between the Santa Ynez Mountains and the Pacific Ocean and had a population of 8,638 in 2020. Montecito is best known as a "celebrity enclave", owing to its concentration of prominent residents.
Thomas Coraghessan Boyle, also known as T. C. Boyle and T. Coraghessan Boyle, is an American novelist and short story writer. Since the mid-1970s, he has published sixteen novels and more than 100 short stories. He won the PEN/Faulkner award in 1988, for his third novel, World's End, which recounts 300 years in upstate New York.
An estate is a large parcel of land under single ownership, which would historically generate income for its owner.
Katharine Dexter McCormick was a U.S. suffragist, philanthropist and, after her husband's death, heir to a substantial part of the McCormick family fortune. She funded most of the research necessary to develop the first birth control pill.
Hope Ranch is an unincorporated coastal suburb of Santa Barbara, California, located in Santa Barbara County. It is bounded on the east by Santa Barbara, on the north and west by the unincorporated area of Noleta, and on the south by the Pacific Ocean. As of the 2000 census, the area had an approximate population of 2,200. The ZIP codes are 93105 and 93110, and the community is in area code 805.
The Santa Barbara Museum of Art (SBMA) is an art museum located in downtown Santa Barbara, California.
Riven Rock is a 1998 novel by American author T. Coraghessan Boyle. It concerns the life of Stanley McCormick, a son of Cyrus McCormick, inventor of the reaper, and Stanley's devoted wife, Katherine McCormick, daughter of Wirt Dexter, a prominent Chicago lawyer.
Ganna Walska was a Polish opera singer and garden enthusiast who created the Lotusland botanical gardens at her mansion in Montecito, California. She was married six times, four times to wealthy husbands. The lavish promotion of her lackluster opera career by her fourth husband, Harold Fowler McCormick, inspired aspects of the screenplay for Citizen Kane.
Santa Barbara Cottage Hospital is a community hospital in the city of Santa Barbara, California. It is owned and operated by the Cottage Health System.
Meghan, Duchess of Sussex is an American member of the British royal family and former actress. She is the wife of Prince Harry, Duke of Sussex, the younger son of King Charles III.
Sergey Grishin was a Russian-American billionaire, engineer and developer, who was the president and chairman of RosEvro Group. Grishin co-owned the Rosevrobank and has claimed that he ‘practically brought the Russian banking system to collapse’ in the 1990s after the Soviet Union collapsed by committing ‘the largest bank fraud scheme ever’, orchestrating a $60 billion heist from the Russian Central Bank.
Nancy Maria "Nettie" McCormick was an American philanthropist. Through marriage, she became a member of the prominent McCormick family.
Shalawa Meadow is a 3-acre (0.012 km2) seaside meadow used in ancient times as a burial site by the Chumash people, adjoining a once large Chumash community about 5 miles east of Santa Barbara, California in the community of Montecito.
Reginald Davis Johnson was an American architect. His practice, based in Pasadena, California, focused on the Los Angeles area and southern California in general, with a mixture of residential and commercial work. Johnson's later work was influenced by his progressive ideas on housing policy.
Francis Townsend Underhill was a politician from the U.S. state of New York and an amateur architect in California.
A series of mudflows occurred in Southern California in early January 2018, particularly affecting areas northwest of Montecito in Santa Barbara County. The incident was responsible for 23 deaths, although the body of one of the victims has never been found. Approximately 163 people were hospitalized with various injuries, including four in critical condition. The disaster occurred one month after a series of major wildfires. The conflagrations devastated steep slopes, which caused loss of vegetation and destabilization of the soil and greatly facilitated subsequent mudflows. The mudflows caused at least $177 million in property damage, and cost at least $7 million in emergency responses and another $43 million to clean up.
Princess Lilibet of Sussex is an American-born member of the British royal family. She is the daughter of Prince Harry, Duke of Sussex, and Meghan, Duchess of Sussex. She is a granddaughter of King Charles III and is seventh in the line of succession to the British throne. She was born during the reign of her great-grandmother Queen Elizabeth II, whose childhood nickname was Lilibet.
Edwards and Plunkett was an American architectural firm active between 1925 and 1940 in Santa Barbara, California. It was founded by William Albert Edwards (1888–1976) and James Joseph Plunkett (1900–1946), who were among the most famous practitioners of the Spanish Colonial Revival style in Santa Barbara. From 1926 to 1928, Henry Ward Howell (1889–1962) was a junior partner, and they operated as Edwards, Plunkett, and Howell. Their works include the Arlington Theatre, the Janssens–Orella–Birk Building, and the original terminal building of the Santa Barbara Municipal Airport.
John James Mitchell was an American banker and a co-founder of United Airlines.