Alameda County is a county located in the U.S. state of California. As of the 2020 census, the population was 1,682,353, making it the 7th-most populous county in the state and 21st most populous nationally. The county seat is Oakland. Alameda County is in the San Francisco Bay Area, occupying much of the East Bay region.
Sunol is an unincorporated area and census-designated place in Alameda County, California. Located in the Sunol Valley of the East Bay, the population was 913 at the 2010 census. It is best known as the location of the Sunol Water Temple and for its historic tourist railroad system, the Niles Canyon Railway.
Interstate 680 (I-680) is a north–south auxiliary Interstate Highway in Northern California. It curves around the eastern cities of the San Francisco Bay Area from San Jose to I-80 at Fairfield, bypassing cities along the eastern shore of San Francisco Bay such as Oakland and Richmond while serving others more inland such as Pleasanton and Concord.
The Sunol Regional Wilderness is a regional park in Alameda County, the eastern San Francisco Bay Area, Northern California. It is located near the town of Sunol, south of Pleasanton and east of Fremont.
Monument Peak is a mountain peak located southeast of Fremont and northeast of Milpitas in the East Bay region of the San Francisco Bay Area in California.
The Diablo Range is a mountain range in the California Coast Ranges subdivision of the Pacific Coast Ranges in northern California, United States. It stretches from the eastern San Francisco Bay Area at its northern end to the Salinas Valley area at its southern end.
The San Ramon Valley is a valley and region in Contra Costa County and Alameda County, in the East Bay region of the San Francisco Bay Area in northern California.
The Berkeley Hills are a part of the East Bay Hills, a range of the Pacific Coast Ranges, and overlook the northeast side of the valley that encompasses San Francisco Bay. They were previously called the "Contra Costa Range/Hills", but with the establishment of Berkeley and the University of California, the current usage was applied by geographers and gazetteers. The Berkeley Hills are included as part of the Diablo Range in the United States Geological Survey (USGS) Geographic Names Information System list of GPS coordinates for the latter.
Alameda Creek is a large perennial stream in the San Francisco Bay Area. The creek runs for 45 miles (72 km) from a lake northeast of Packard Ridge to the eastern shore of San Francisco Bay by way of Niles Canyon and a flood control channel. Along its course, Alameda Creek provides wildlife habitat, water supply, a conduit for flood waters, opportunities for recreation, and a host of aesthetic and environmental values. The creek and three major reservoirs in the watershed are used as water supply by the San Francisco Public Utilities Commission, Alameda County Water District and Zone 7 Water Agency. Within the watershed can be found some of the highest peaks and tallest waterfall in the East Bay, over a dozen regional parks, and notable natural landmarks such as the cascades at Little Yosemite and the wildflower-strewn grasslands and oak savannahs of the Sunol Regional Wilderness. After an absence of half a century, ocean-run steelhead trout are able to return to Alameda Creek to mingle with remnant rainbow trout populations. Completion of a series of dam removal and fish passage projects, along with improved stream flows for cold-water fish and planned habitat restoration, enable steelhead trout and Chinook salmon to access up to 20 miles (32 km) of spawning and rearing habitat in Alameda Creek and its tributaries. The first juvenile trout migrating downstream from the upper watershed through lower Alameda Creek toward San Francisco Bay was detected and documented in April 2023.
Discovery Peak is a peak in the Diablo Range of California and is the highest point in Alameda County. The officially unnamed peak is also known as Valpe Ridge–Rose Flat due to its location near Rose Flat. The area is high enough to receive occasional snowfall during the winter, which generally melts within a few days of falling. Although it is on private property, the Ohlone Wilderness Trail, in Sunol Regional Wilderness, comes to within about 1 mile (1.6 km) of the summit.
Pleasanton Ridge Regional Park is a 5,271-acre (21.33 km2) park in the East Bay Regional Park District overlooking Pleasanton, California and the Livermore Valley to the east. The park is scheduled to grow by almost 1,500 acres (6.1 km2) (sic) with the acquisition of the Tyler Ranch.
Kilkare Woods, also known as Kilcare Woods, is a small rural unincorporated community of about 773 people in southern Alameda County, California, near Pleasanton.
Dresser is an unincorporated community in Alameda County, California. Its ZIP code is 94536 and its area codes are 510 and 341.
The San Leandro Hills are a low mountain range of the Southern Inner California Coast Ranges System, located on the eastern side of the San Francisco Bay. Geologically, they are a southern continuation of the Berkeley Hills to the north, and both are components of the East Bay Hills, which refers geologically to all of the ranges east of the Bay from the Hayward Fault in the west to the Calaveras Fault in the east. The United States Geological Survey (USGS) Geographic Names Information System, however, includes the San Leandro Hills as part of the Diablo Range in its list of GPS coordinates for the latter.
The Briones Hills form a low mountain range in western Contra Costa County, in the East Bay region of the San Francisco Bay Area, California, United States. The Briones Hills are the northernmost portion of the East Bay Hills, which refers geologically to all of the ranges east of the Bay from the Hayward Fault in the west to the Calaveras Fault in the east. The United States Geological Survey (USGS) Geographic Names Information System, however, includes the Briones Hills as part of the Diablo Range in its list of GPS coordinates for the latter.
East Pleasanton is an unincorporated community in Alameda County, California. It is located 2.25 miles (3.6 km) east-northeast of Pleasanton, at an elevation of 384 feet (117 m).
Amador Valley is a valley in eastern Alameda County, California and is the location of the cities of Dublin and Pleasanton. Part of Tri-Valley, the valley is bounded by the foothills of the Diablo Range on the north and south, Pleasanton Ridge to the west, and Livermore Valley to the east.
Arroyo Valle or Arroyo Del Valle is a 36.4-mile-long (58.6 km) westward-flowing stream that begins in northeastern Santa Clara County, California, and flows northwesterly into Alameda County where it is dammed to form Lake Del Valle. After that Arroyo Valle is a tributary to Arroyo de la Laguna which in turn flows into Alameda Creek and thence to San Francisco Bay. In the past, the Arroyo Valle had a significant steelhead migration; however, degradation of the stream in the latter half of the 20th century has decimated this anadromous fish population.
Arroyo Bayo is an 8-mile-long (13 km) perennial stream which flows northwest along Mount Hamilton Road east of Mt. Hamilton in the Diablo Range. It is part of the southern Alameda Creek watershed in Santa Clara County, California.
Rocky Ridge is a 2,020 ft (620 m) ridge in the Inner Coast Ranges in western Contra Costa County, California, in the San Francisco Bay Area. Being the second-highest mountain in the county, it is visible from much of the surrounding area. The ridge is a very prominent feature in the geography of the towns of Lafayette, Moraga and Orinda, California.
