Contra Costa County is a county in the state of California in the United States. As of the 2010 census, the population was 1,049,025. The county seat is Martinez. It occupies the northern portion of the East Bay region of the San Francisco Bay Area, and is primarily suburban. The county's name is Spanish for "opposite coast", referring to its position on the other side of the bay from San Francisco. Contra Costa County is included in the San Francisco–Oakland–Berkeley, CA Metropolitan Statistical Area.
Brentwood is a city in Contra Costa County, California, United States. It is located in the East Bay region of the San Francisco Bay Area. The population is 51,481 as of 2010, an increase of 121 percent from 23,302 at the 2000 census.
The East Bay Regional Park District (EBRPD) is a special district operating in Alameda County and Contra Costa County, California, within the East Bay area of the San Francisco Bay Area. It maintains and operates a system of regional parks which is the largest urban regional park district in the United States. The administrative office is located in Oakland.
Area code 925 is a California telephone area code that was split from area code 510 on March 14, 1998. It covers the inland portions of the East Bay counties of Alameda and Contra Costa in the northern area of California.
Morgan Territory is a region in California on the east side of Mount Diablo in the San Francisco East Bay's Contra Costa County. The area is named for settler Jeremiah Morgan.
Sonoma Creek is a 33.4-mile-long (53.8 km) stream in northern California. It is one of two principal drainages of southern Sonoma County, California, with headwaters rising in the rugged hills of Sugarloaf Ridge State Park and discharging to San Pablo Bay, the northern arm of San Francisco Bay. The watershed drained by Sonoma Creek is roughly equivalent to the wine region of Sonoma Valley, an area of about 170 square miles (440 km2). The State of California has designated the Sonoma Creek watershed as a “Critical Coastal Water Resource”. To the east of this generally rectangular watershed is the Napa River watershed, and to the west are the Petaluma River and Tolay Creek watersheds.
John Marsh. He was an early pioneer and settler in Alta California, the first Harvard graduate and the first to practice medicine there. He knew Hebrew, Latin and Greek, and was the first to compile a dictionary of the Sioux language. He became one of the wealthiest ranchers in California, and was one of the most influential men in the establishment of California statehood.
John A. Nejedly was a district attorney and Republican state senator who represented Contra Costa County, California from 1958 to 1980.
Cerrito Creek is one of the principal watercourses running out of the Berkeley Hills into San Francisco Bay in northern California. It is significant for its use as a boundary demarcation historically, as well as presently. In the early 19th century, it separated the vast Rancho San Antonio to the south from the Castro family's Rancho San Pablo to the north. Today, it marks part of the boundary between Alameda County and Contra Costa County. The main stem, running through a deep canyon that separates Berkeley from Kensington, is joined below San Pablo Avenue by a fan of tributaries, their lower reaches mostly in culverts. The largest of these is Middle or Blackberry Creek, a southern branch.
Radke Martinez Regional Shoreline (RMRS) is a regional park on the shoreline of Carquinez Strait in Martinez, located in northern Contra Costa County, California. Formerly known as the Martinez Regional Shoreline, it was renamed on December 6, 2016, in honor of the late Ted Radke and his late wife Kathy Radke.
Wildcat Creek is a 13.4-mile-long (21.6 km) creek which flows through Wildcat Canyon situated between the Berkeley Hills and the San Pablo Ridge, emptying into San Pablo Bay in Contra Costa County, northern California.
Rodeo Creek is an 8.3-mile-long (13.4 km) intermittent stream in western Contra Costa County, California running through the town of Rodeo to San Pablo Bay.
Alhambra Creek is a stream in Contra Costa County, in the East Bay region of the San Francisco Bay Area in northern California.
San Diego Creek is a 16-mile (26 km) urban waterway flowing into Upper Newport Bay in Orange County, California in the United States. Its watershed covers 112.2 square miles (291 km2) in parts of eight cities, including Irvine, Tustin, and Costa Mesa. From its headwaters in Laguna Woods the creek flows northwest to its confluence with Peters Canyon Wash, where it turns abruptly southwest towards the bay. Most of the creek has been converted to a concrete flood control channel, but it also provides important aquatic and riparian habitat along its course and its tidal estuary.
Chelsea Wetlands is a riparian marsh on lower Pinole Creek and a tidal wetland at its mouth on San Pablo Bay, in Contra Costa County, northern California. It is located within the city of Hercules, in the East Bay region of the San Francisco Bay Area.
Marsh Creek is a stream in east Contra Costa County, California in Northern California which rises on the eastern side of Mount Diablo and flows 30 miles (48 km) to the Sacramento–San Joaquin River Delta at Oakley, California, near Big Break Regional Shoreline. The creek flows through Marsh Creek State Park (California), where water is impounded to form Marsh Creek Reservoir, then through the city of Brentwood, California.
Rush Creek is a stream in eastern Marin County, California, United States. It originates on the north edge of Novato, California and flows 1.5 miles (2.4 km) northeasterly through wetlands into Black John Slough and then the Petaluma River. The name is associated with Peter Rush who bought land near Novato in 1862.
The Old Borges Ranch is a 1,035 acres (419 ha) Historic District containing four contributing buildings, in the Diablo Foothills of the northern Diablo Range, within the 2,600-acre (1,100 ha) Walnut Creek Open Space in Contra Costa County, California.
Big Break Regional Shoreline is a regional park in Oakley, Contra Costa County, northern California. It is a part of the East Bay Regional Park District system.
Marsh Creek State Historic Park is a California state park in east Contra Costa County, California, United States. It was named as the newest California State Park on January 27, 2012. The newly named park contains 3,659 acres and is about 3.3 miles (5.3 km) south of downtown Brentwood. It is not open to the public as of January 2015. No opening date has been announced.
