California's 11th congressional district

Area code 925 is a telephone area code in the North American Numbering Plan for a northern part of the U.S. state of California. It was created in an area code split of area code 510 in 1998. The numbering plan area comprises the inland portions of the East Bay counties of Alameda and Contra Costa.

North Gate is a census-designated place in Contra Costa County, California. North Gate sits at an elevation of 253 feet (77 m). The 2010 United States census reported North Gate's population was 679.

The Old Borges Ranch is a 1,035 acres (419 ha) historic district in the Mt. Diablo foothills within the 2,600-acre (1,100 ha) Walnut Creek Open Space in Contra Costa County, California. A former cattle ranch, Old Borges Ranch includes multiple historic buildings, a ranger station, farm animals, and access to trails.

Northgate High School (NHS) is a public high school located in the suburban Northgate neighborhood of Walnut Creek, California, United States. The most recent of five high schools in the Mount Diablo Unified School District, the school was built in 1974, and is home to approximately 1,500 students from Walnut Creek and Concord, California, grades 9–12. Its name derives from its location at the north entrance of Mount Diablo State Park.

Castle Rock Regional Recreation Area is a 18,000 acres (73 km2) regional park of the East Bay Regional Park District. It is located in Contra Costa County, in the East Bay region of northern California.

Diablo Foothills Regional Park is a 1,060 acres (4.3 km2) regional park of the East Bay Regional Park District. It is located in Contra Costa County, in the East Bay region of northern California.

Rancho Arroyo de Las Nueces y Bolbones (also called "San Miguel") was a 17,782-acre (71.96 km2) Mexican land grant in present-day Contra Costa County, California given in 1834 by Governor José Figueroa to Juana Sanchez de Pacheco.The grant was named after the principal waterway, Arroyo de las Nueces (Walnut Creek), and for the local group of indigenous Americans (known as Bolbones in Spanish, also known as Volvon). The grant was on the western slope of Mount Diablo and includes the area of the present-day city of Walnut Creek. Approximately a quarter of the original rancho has been protected since the early 20th century within the boundaries of Mt. Diablo State Park.

Rancho San Ramon (St. Raymond Ranch in Spanish) was a 8,917-acre (36.09 km2) Mexican land grant in the northern San Ramon Valley of present-day Contra Costa County, California. Rancho San Ramon (Amador) was adjacent in the southern San Ramon Valley. It was given in 1833 by Governor Jose Figueroa to Mariano Castro and Bartolome Pacheco. Governor Figueroa granted Castro and Pacheco two square leagues of San Ramon Valley from the crest of the western ridge to the crest of the east. Castro had the northern square league, and Pacheco the southern.The grant included present-day Alamo, Danville and northern San Ramon.

Shadelands Ranch was established by Hiram Penniman, an early American settler of California in 1856 as one of the first and largest farms in California's Ygnacio Valley.Penniman arrived in California in 1853 and three years later purchased 500 acres (2.0 km2) of land from Encarnación Pacheco, daughter of Juana Sanchez de Pacheco, then owner of Rancho Arroyo de Las Nueces y Bolbones from which the 500 acres (2.0 km2) were taken.Penniman planted a variety of fruit and nuts, including peaches, pears, apricots, grapes, almonds, and walnuts, as well as prunes, which served as Penniman's most important and most profitable crop. The original name of Penniman's ranch was "Shadelands Fruit Farm". Hiram Penniman fell ill in January 1897 and care and oversight of the ranch became largely the responsibility of Penniman's oldest daughter, Mary. The ranch fell on hard times with a drop in the price of crops and Mary had to depend on the charity of her sister Bessie's wealthy husband to take care of many of the ranch's financial concerns.When Hiram finally died, ownership of the ranch passed to Mary, then subsequently to Bessie after Mary's death in 1909. Bessie and her husband Albert Johnson mainly managed the ranch from afar, as Albert's business concerns lay mainly in distant Chicago. In 1921, Bessie hired Edmund Moyer to reside at the ranch with his family and supervise it. Bessie died in 1943 in a car accident, and not long after, Albert himself became severely ill. In 1947, with an eye to his own mortality, Albert Johnson formed the Gospel Foundation, an organization meant to oversee his extensive assets after his death. Johnson died in 1948 of cancer, and deeded all his property to the Gospel Foundation, including Shadelands.The Gospel Foundation continued to administer Shadelands until 1970, when they gave the remaining 1.5 acres (6,100 m2) of land and the ranch house to the city of Walnut Creek, California. Today it is managed by the Walnut Creek Historical Society, and has been open to the public since 1972 as a historical museum, the ranch house still furnished with much of the Pennimans' original furniture. The house was placed on the National Register of Historic Places in 1985.

Shell Ridge is a census-designated place in Contra Costa County, California, United States. Shell Ridge sits at an elevation of 295 feet (90 m). The 2010 United States census reported Shell Ridge's population was 959.

Berean Christian High School is a private, Christian coeducational high school in Walnut Creek, California, United States, serving ninth through twelfth. Its name comes from the Bereans in Acts 17:11. The school has served the East Bay since 1969, having moved to its current Walnut Creek campus in 1985.

Rancho San Miguel is a neighborhood in Walnut Creek, California. It is named after the Alta California Rancho Rancho Arroyo de Las Nueces y Bolbones which was also referred to as Rancho San Miguel. Until the mid-1950s the area consisted largely of walnut orchards, until developer Joseph Eichler built a subdivision north of Shell Ridge and Ygnacio Valley Road.