Tassajara, California

Camino Tassajara (Spanish for "Path of Carne Seca") is a census-designated place in Contra Costa County, California. Camino Tassajara sits at an elevation of 814 feet (248 m). The 2010 United States census reported Camino Tassajara's population was 2,197.

Pacific Air Lines Flight 773 was a Fairchild F27A Friendship airliner that crashed on May 7, 1964, near Danville, California, a suburb east of Oakland. The Thursday morning crash was most likely the first instance in the United States of an airliner's pilots being shot by a passenger as part of a mass murder–suicide. Francisco Paula Gonzales, 27, shot both pilots before turning the gun on himself, causing the plane to crash, killing all 44 aboard.As of May 2021, the crash of Flight 773 remains the worst incident of mass murder in modern California history, one death more than the subsequent Pacific Southwest Airlines Flight 1771 hijacking in 1987.

Dougherty Valley High School (commonly Dougherty, Dougherty Valley, Dougherty Valley High, DVHS, or DV High) is a public high school located in the Windemere development of San Ramon, California, United States. The valley name comes from James Witt Dougherty, a 19th-century landowner and local politician. It is one of four high schools in the San Ramon Valley Unified School District (SRVUSD), along with California High School, San Ramon Valley High School, and Monte Vista High School. Constructed by Shapell Industries of California and Windemere Ranch Partners BLC, Dougherty was the first developer-built school in the SRVUSD. The school opened its doors in 2007. Dougherty's nickname is the Wildcats, and its school colors are navy, Columbia blue, and silver. It is known for its state-of-the-art campus, which features a performing arts center and aquatics center in a joint-use agreement with the city. Dougherty is the top school in the district based on Academic Performance Index. The school is also home to over 200 clubs and many afterschool activities.

Blackhawk is an unincorporated planned community and census-designated place located in Contra Costa County, California, United States, east of Danville and Oakland. As of the 2010 census it had a population of 9,354. Governed by county rules/regulations and a homeowner association (HOA), Blackhawk has a country club, two golf courses, sports complex, restaurants, and the adjacent Blackhawk Plaza. 24-hour security plus additional law enforcement contracted through the Contra Costa County Sheriff's Office is provided by HOA dues. The area is covered by the San Ramon Valley Fire Protection District. The ZIP code is 94506. The community is inside area code 925. Blackhawk is known for its uniform architecture and suburban lifestyle, with the median household income being $167,875 and median home price of $1,117,500.

Blackhawk-Camino Tassajara is a former census-designated place (CDP) in Contra Costa County, California, near the town of Danville. The unincorporated area consisted of the Blackhawk planned community and the surrounding Camino Tassajara area. At the 2000 census, the CDP's population was 10,048. The CDP was split between Blackhawk and Camino Tassajara before the 2010 census.

The Blackhawk Museum, founded in 1988, consists of five distinct galleries in a facility in Danville, California with a significant collection of classic, rare, and unique automobiles. In addition to its gallery Classic Car Collection, the museum's four other galleries are The Spirit of the Old West, Art of Africa, Into China, and World of Nature. The museum is located within the Blackhawk Plaza shopping center and is an affiliate through the Smithsonian Affiliations program. The museum is a subsidiary of a not-for-profit Behring Global Educational Foundation.

The 1980 Livermore earthquake occurred on January 24 at 11:00 PST in California. The epicenter of the 5.8 Mw earthquake was a hilly area 12 km (7.5 mi) southeast of Mount Diablo and north of Livermore Valley. The earthquake had a maximum Modified Mercalli intensity of VII (Very strong). Forty four people were injured and damage across the San Francisco Bay Area totaled $11.5 million, with the majority inflicted at the Lawrence Livermore National Laboratory.

The Hemme Hills are a mountain range in Contra Costa County, California.

The Quarry Lane School is a private, college-preparatory and International Baccalaureate school in California that offers education for students from preschool to twelfth grade. The School was founded by Sabri Arac, who is the current Head of School.

Morgan Territory Regional Preserve is a regional park in Contra Costa County, California. Located east of Clayton and north of Livermore, California, bordering on Mt. Diablo State Park, it is part of the East Bay Regional Park District (EBRPD). The preserve was founded in 1975 with fewer than 1,000 acres (400 ha), but EBRPD has gradually acquired more property, and, since 2015, the preserve encompasses 5,230 acres (2,120 ha). The main access roads run from Livermore and Clayton.The preserve was named for Morgan Territory, an historic name for the area associated with Anglo-American pioneer Jeremiah Morgan, who in 1856 acquired thousands of acres on the east side of Mount Diablo and developed a ranch. Popular activities in the park are camping, hiking, horseback riding and picnicking. A reservation is required to use the backpacking campsite. This is not wheelchair accessible. Picnic sites are first come, first served. Dogs are allowed in the preserve and no fee is charged for their admittance.

Morgan Territory is an historic ranching area on the east side of Mount Diablo in San Francisco East Bay's Contra Costa County. It was named after Anglo-American pioneer Jeremiah Morgan, a migrant from Alabama and Iowa who acquired 2000 acres and developed a ranch here, starting in 1857. The earliest historic occupants had long been small, highly localized tribes of Native Americans, who spoke dialects of the Bay Miwok language. During the Spanish and Mexican periods, the Native Americans were displaced and colonial governments made large grants of land to high-ranking officials. Americans began to buy such properties after moving into the area in the mid-19th century and later. Ranches for livestock and some farms were developed here. In the mid-20th century, the large ranch holdings were being sold for suburban residential development. Concerned about the loss of open space, in 1975 the East Bay Regional Park District (EBRPD) acquired 930 acres of land to establish the Morgan Territory Regional Preserve, named for the historic area. During the following decades, it expanded this preserve to protect open space, habitat and watersheds for the public. The preserve now totals 5,230 acres (2,120 ha) in area. In addition, the adjacent Mount Diablo State Park, established in the 1920s, has been part of a trail network connected to the Morgan Territory Regional Preserve . It acquired management and oversight of properties known as Morgan Ranch and Morgan Red Corral in the late 1980s. These lands are related to Morgan's historic ranch and were held by his descendants into the late 20th century.

Tassajara Creek Regional Park (TCRP) is a park near Dublin in the U.S. state of California, which has been called one of the most obscure parks in the East Bay Regional Park System. It is located adjacent to the eastern boundary of Camp Parks and was established in 1991 as a staging facility for the Tassajara Creek Regional Trail. Because of TCRP's small size—27 acres (11 ha)—and the existence of a security fence along the Camp Parks boundary, usage of the park by both humans and wildlife is limited.Amenities are minimal. There is just one picnic table and one short hiking trail, but the venue is rarely crowded. One writer opined that TCRP filled a worthwhile niche in the park district's offerings, saying that "this is a very friendly spot for young children and puppies to experience a first hike".