Sacramento County is a county located in the U.S. state of California. As of the 2020 census, the population was 1,585,055. Its county seat is Sacramento, which has been the state capital of California since 1854.
Fresno County, officially the County of Fresno, is a county located in the central portion of the U.S. state of California. As of the 2020 Census, the population was 1,008,654. The county seat is Fresno, the fifth-most populous city in California.
Madera County, officially the County of Madera, is a county located at the geographic center of the U.S. state of California. It features a varied landscape, encompassing the eastern San Joaquin Valley and the central Sierra Nevada, with Madera serving as the county seat. Established in 1893 from part of Fresno County, Madera County reported a population of 156,255 in the 2020 census.
San Joaquin County, officially the County of San Joaquin, is a county located in the U.S. state of California. As of the 2020 census, the population was 779,233. The county seat is Stockton.
The Central Valley is a broad, elongated, flat valley that dominates the interior of California. It is 40–60 mi (60–100 km) wide and runs approximately 450 mi (720 km) from north-northwest to south-southeast, inland from and parallel to the Pacific coast of the state. It covers approximately 18,000 sq mi (47,000 km2), about 11% of California's land area. The valley is bounded by the Coast Ranges to the west and the Sierra Nevada to the east.
Fresno is a major city in the San Joaquin Valley of California, United States. It is the county seat of Fresno County and the largest city in the greater Central Valley region. It covers about 115 square miles (300 km2) and had a population of 542,107 as of the 2020 census, making it the fifth-most populous city in California, the most populous inland city in California, and the 34th-most populous city in the nation.
Oakhurst is a census-designated place (CDP) in Madera County, California, United States, 14 miles (23 km) south of the entrance to Yosemite National Park, in the foothills of the Sierra Nevada. At an elevation of 2,274 ft (693 m), Oakhurst is situated at the junction of Highway 41 and Highway 49, marking the southern end of California's Gold Country. It is part of the Madera metropolitan statistical area.
Northern California is a geographic and cultural region that comprises the northern portion of the U.S. state of California, spanning the northernmost 48 of the state's 58 counties. Northern California in its largest definition is determined by dividing the state into two regions, the other being Southern California. The main northern population centers include the San Francisco Bay Area, the Greater Sacramento area, the Redding, California, area south of the Cascade Range, and the Metropolitan Fresno area. Northern California also contains redwood forests, along with most of the Sierra Nevada, including Yosemite Valley and part of Lake Tahoe, Mount Shasta, and most of the Central Valley, one of the world's most productive agricultural regions. Northern California is also home to Silicon Valley, the global headquarters for some of the most powerful tech and Internet-related companies in the world, including Meta, Apple, Google, and Nvidia.
The San Joaquin River is the longest river of Central California. The 366-mile (589 km) long river starts in the high Sierra Nevada, and flows through the rich agricultural region of the northern San Joaquin Valley before reaching Suisun Bay, San Francisco Bay, and the Pacific Ocean. An important source of irrigation water as well as a wildlife corridor, the San Joaquin is among the most heavily dammed and diverted of California's rivers.
The San Joaquin Valley is the southern half of California's Central Valley. Famed as a major breadbasket, the San Joaquin Valley is an important source of food, producing a significant part of California's agricultural output.
The Sacramento Valley is the area of the Central Valley of the U.S. state of California that lies north of the Sacramento–San Joaquin River Delta and is drained by the Sacramento River. It encompasses all or parts of ten Northern California counties. Although many areas of the Sacramento Valley are rural, it contains several urban areas, including the state capital, Sacramento.
The Governor Edmund G. Brown California Aqueduct is a system of canals, tunnels, and pipelines that conveys water collected from the Sierra Nevada Mountains and valleys of Northern and Central California to Southern California. Named after California Governor Edmund Gerald "Pat" Brown Sr., the over 400-mile (640 km) aqueduct is the principal feature of the California State Water Project.
Bass Lake, situated in Madera County, California, within the Sierra National Forest and approximately 14 mi (23 km) south of Yosemite National Park, is a popular recreational area. The lake, formed by the Crane Valley Dam on Willow Creek, a tributary to the San Joaquin River, spans about four miles (6.4 km) in length and one-half mile (0.80 km) in width. Constructed in 1910 by Pacific Gas and Electric, the 145 ft (44 m) concrete gravity dam generates hydro-electric power through controlled releases. The lake supports a diverse ecosystem, including species such as black bears, mule deer, bald eagles, and Great blue herons, along with a variety of fish species.
Central California is generally thought of as the middle third of the U.S. state of California, north of Southern California and south of Northern California. It includes the northern portion of the San Joaquin Valley, part of the Central Coast, the central hills of the California Coast Ranges and the foothills and mountain areas of the central Sierra Nevada.
The Fresno River is a river in Central California and a major tributary of the San Joaquin River. It runs approximately 83 miles (134 km) from the Sierra Nevada Range to the San Joaquin River if measured from the source of Rainier Creek, near Raymond Mountain in Yosemite National Park. Although called the 'Fresno' River, it is one of the largest and longest river systems in Madera County.
The Greater Sacramento area refers to a metropolitan region in Northern California comprising either the U.S. Census Bureau defined Sacramento–Roseville–Arden-Arcade metropolitan statistical area or the larger Sacramento–Roseville combined statistical area, the latter of which consists of seven counties, namely Sacramento, Yolo, Placer, El Dorado, Sutter, Yuba, and Nevada counties.
The following outline is provided as an overview of and topical guide to the U.S. state of California:
The San Joaquin Valley of California has seen environmental issues arise from agricultural production, industrial processing and the region's use as a transportation corridor.
The Central Valley in California subsides when groundwater is pumped faster than underground aquifers can be recharged. The Central Valley has been sinking (subsiding) at differing rates since the 1920s and is estimated to have sunk up to 28 feet. During drought years, the valley is prone to accelerated subsidence due to groundwater extraction. California periodically experiences droughts of varying lengths and severity.
United States 
California 
