Walnut Creek (California)

Grayson Creek is a stream in Contra Costa County in northern California that flows northeasterly 7.4 miles (11.9 km) from its origin in Briones Regional Park to Pacheco Slough four miles east of Martinez. Pacheco Slough, in turn, connects to Suisun Bay. The Grayson Creek subwatershed is part of the Walnut Creek watershed and includes the cities of Pleasant Hill and Pacheco, California. Murderer's (aka Murderous) Creek is a seasonal drainage creek also located in Pleasant Hill. Murderous Creek was named when the surveyors found a victim hanging from a tree near the stream in 1849. Today, large portions of the Creek have disappeared, but it can be found meandering through several residential subdivisions below the hillside near Pleasant Hill Road and Withers Avenue. The portion of Murderer's Creek that remains is being heavily surcharged and overburdened by the discharge of runoff water into the Creek from County roads and from upslope private developments, and the riparian property owners are experiencing extensive erosion and subsidence issues.

Waterbird Regional Preserve is a 192 acres (0.78 km2) regional park located in Contra Costa County, California, adjacent to the city of Martinez. It is part of the East Bay Regional Park District (EBRPD). It primarily consists of an area known as McNabney Marsh, which lies alongside Interstate 680 near the Sacramento-San Joaquin Delta and between two large and active oil refineries. The marsh drains into Suisun Bay via Peyton Slough. The area provides habitat for a wide variety of waterfowl and shorebirds for resting and feeding.

Pacheco Creek is a 3.4-mile-long (5.5 km) waterway in central Contra Costa County, California, United States. It empties into Suisun Bay. It is formed by the intersection of Walnut Creek, Grayson Creek and Pine Creek. The creek has a run of chinook salmon and steelhead trout after periods of rain in the winter and fall.

Vine Hill is a census-designated place (CDP) in Contra Costa County, California, United States. The population was 3,761 at the 2010 census. It is located 2.25 miles (3.6 km) east of downtown Martinez.

Matteo's Dream is an all-abilities playground in an urban park in Concord, California. It opened on May 16, 2007. Matteo Henderson was a boy with serious disabilities including blindness, cerebral palsy, and cognitive development. He used a wheelchair for transportation. The playground was built with US$770,000 of donated materials and with the labor of 1600 volunteers. Matteo, and many other children of all abilities have enjoyed the playground. Persons with disabilities are able to drive their wheelchairs directly onto the structure. Features of the playground are specially engineered to accommodate people with various disabilities. Matteo died on March 16, 2011, at the age of 11. In January 2014, a Matteo's Dream themed Rose Parade float was featured in the 125th Rose Parade in Pasadena, California.

Buchanan Field Airport (IATA: CCR, ICAO: KCCR, FAA LID: CCR) is a medium-sized general and business public airport in Contra Costa County, California, United States, one mile west of the center of Concord and just east of Pacheco in the San Francisco Bay Area. The airport's street address is 550 Sally Ride Drive, Concord.The National Plan of Integrated Airport Systems for 2011–15 categorized it as a reliever airport, and it has an FAA certified airport traffic control tower.

Seal Islands are a pair of islands in Suisun Bay at the mouth of the Sacramento-San Joaquin River Delta in Contra Costa County, California, 10 km east of Benicia, and 500 metres off-shore from the former Concord Naval Weapons Station and Port Chicago Naval Magazine.

The Don Fernando Pacheco Adobe is located at 3119 Grant Street in Concord, California.The Fernando Pacheco Adobe is the only Concord landmark listed in all three Historical Registries: entry on the National Register occurred on June 6, 1980; the California Registered landmark number is 455; and the Concord Historical Landmark designation is 1-26-26/5458. The Adobe was built by Don Fernando in the early 1850s as the base of operations for his growing ranch activities, and as his family's formal residence. Fernando was the oldest son of Don Salvio Pacheco. He was born on May 30, 1818, while his father was assigned to a Militia-Guard unit at the Pueblo of San Jose. At age 17, he was sent to take possession and mark the boundaries of his father's 17,921 acre land grant. Fernando was given 1,500 acres as initial share of the rancho. He subsequently married Pasquala (Figeroa) (Juarez) – a widow. Their six children: Pedro, Bonifacio, Cipriana, Maria Asuncion (who married Jose Julian Cantua), Librada and Bersabe were raised at the Adobe. Don Fernando's family enjoyed a reputation as gracious hosts. They were famous for their generosity and extensive fiestas on Adobe's then lush, well irrigated grounds. The Adobe's 32” thick walls were built of local adobe – mud. Ownership remained with Don Fernando's descendants until 1918. The land and adobe were then sold to the California Water Service Company ; it then was essentially abandoned. In 1940 title to 2 and 1/2 acres and the deteriorated adobe structure transferred to Contra Cost County, which leased it to the Horsemen's Association. The Horsemen undertook a major rehabilitation, and used the then remote facility and corral for their headquarters. In 1979, the country transferred the Adobe and its grounds to its current owner, the City of Concord. In the early 1980s the Horsemen, the city, and the Concord Historical Society completed another restoration effort to stabilize the landmark Adobe. The Horsemen's Association continues activities on site. The Fernando Pacheco Adobe is located at 3119 Grant Street, now well within the city limits. It is adjacent to Hillcrest Park and the De Anza Expedition Memorial marker.

Rancho Monte del Diablo (Devil's Mount Ranch in Spanish) was a 17,921-acre (72.52 km2) Mexican land grant in present-day Contra Costa County, California given in 1834 by Governor José Figueroa to Salvio Pacheco. The name "Monte del Diablo" means "thicket of the devil" in Spanish. The name was later incorrectly translated as Mount Diablo. The grant covered the area from the Walnut Creek channel east to the hills, and generally from the Mount Diablo foothills north along Lime Ridge to Avon on the Carquinez Strait of the Sacramento River, and included present day Concord and parts of Pleasant Hill. Pacheco and Clayton are outside of the Rancho Monte del Diablo grant.

The William T. Hendricks House, at 218 Center Ave in Pacheco, California, is a one-story house upon a raised basement, built in 1857. It was listed on the National Register of Historic Places in 1983.In 1857 William Hendrick purchased a tract of land from a Mr. Loucks and on it erected a dwelling house and a flour mill. This mill was the only flour mill ever operated in Contra Costa County.The house as built in 1857 in Queen Anne style was a rectangle 20 by 40 feet (6.1 m × 12.2 m) in plan with a porch all around; a detached kitchen was behind. The house was expanded in the 1890s to the west with an addition having a slanted bay window on its front, bringing the plan to 42 by 40 feet (13 m × 12 m).The raised basement has gained a door and three windows which were not part of the early house.

The Yuba City bus disaster occurred on May 21, 1976, in Martinez, California. A chartered school bus transporting 52 passengers on an elevated offramp left the roadway, landing on its roof. Of the 52 passengers (not including the driver), 28 students and an adult adviser were killed in the crash.It remains the deadliest highway disaster ever investigated by the National Transportation Safety Board (NTSB) since its creation.

Clyde is a census-designated place (CDP) in Contra Costa County, California, United States. The population was 678 at the 2010 census. It is located six miles (10 kilometres) east of Martinez.