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Rocky Ridge (California)
Rocky Ridge is a 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, California, Lafayette, Moraga, California, Moraga and Orinda, California. Etymology The current name originates from the oddly-formed sedimentary rock outcrops that trace the crest of the ridge. The original Saclan name for the ridge has been lost, however the current managers of the ridge, the EBRPD and EBMUD, believe it was commonly traversed by native groups. Geography Rocky Ridge is the highest point in the Berkeley Hills, which are a generally north-south trending subrange of the Inner Coast Ranges named for the nearby city of Berkeley, California. The region has a cool-summer Mediterranean climate and frequently receives fog from the nearby Pacific Ocean. Winters ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inner Coast Ranges
The Inner Coast Ranges are a long mountain range subsystem of the California Coast Ranges, running generally north–south in western California, from Santa Barbara County north to the Klamath Mountains system. Geography The term ''inner'' is a reference to the greater distance of these ranges inland/east from the Pacific Ocean's coast in California, compared to the ''outer'' of the Outer Coast Ranges subsystem, that are along or near the Pacific Coast. Northern Inner Coast Ranges The Northern Inner Coast Ranges are the eastern/inland section of the Northern Coast Ranges, running in Northern California from the North Bay (San Francisco Bay Area), North Bay region of the San Francisco Bay Area north to the Klamath Mountains system. Ranges include the Mayacamas Mountains, Sonoma Mountains, and Vaca Mountains. Southern Inner Coast Ranges The Southern Inner Coast Ranges are the eastern/inland section of the Southern California Coast Ranges, Coast Ranges, running in Northern, Central ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Berkeley, California
Berkeley ( ) is a city on the eastern shore of San Francisco Bay in northern Alameda County, California, United States. It is named after the 18th-century Anglo-Irish bishop and philosopher George Berkeley. It borders the cities of Oakland, California, Oakland and Emeryville, California, Emeryville to the south and the city of Albany, California, Albany and the Unincorporated area, unincorporated community of Kensington, California, Kensington to the north. Its eastern border with Contra Costa County, California, Contra Costa County generally follows the ridge of the Berkeley Hills. The 2020 United States census, 2020 census recorded a population of 124,321. Berkeley is home to the oldest campus in the University of California, the University of California, Berkeley, and the Lawrence Berkeley National Laboratory, which is managed and operated by the university. It also has the Graduate Theological Union, one of the largest religious studies institutions in the world. Berkeley is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Francisco
San Francisco, officially the City and County of San Francisco, is a commercial, Financial District, San Francisco, financial, and Culture of San Francisco, cultural center of Northern California. With a population of 827,526 residents as of 2024, San Francisco is the List of California cities by population, fourth-most populous city in the U.S. state of California and the List of United States cities by population, 17th-most populous in the United States. San Francisco has a land area of at the upper end of the San Francisco Peninsula and is the County statistics of the United States, fifth-most densely populated U.S. county. Among U.S. cities proper with over 250,000 residents, San Francisco is ranked first by per capita income and sixth by aggregate income as of 2023. San Francisco anchors the Metropolitan statistical area#United States, 13th-most populous metropolitan statistical area in the U.S., with almost 4.6 million residents in 2023. The larger San Francisco Bay Area ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viewshed
A viewshed is the geographical area that is visible from a location. It includes all surrounding points that are in line-of-sight with that location and excludes points that are beyond the horizon or obstructed by terrain and other features (e.g., buildings, trees). Conversely, it can also refer to area from which an object can be seen. A viewshed is not necessarily " visible" to humans; the same concept is used in radio communications to indicate where a specific combination of transmitter, antenna, and terrain allow reception of signal. Viewsheds are commonly used in terrain analysis, which is of interest to urban planning, archaeology, and military science. In urban planning, for example, viewsheds tend to be calculated for areas of particular scenic or historic value that are deemed worthy of preservation against development or other change. Viewsheds are often calculated for public areas — for example, from public roadways, public parks, or high-rise buildings. The preserv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nike Missile
Project Nike (Greek: Νίκη, "Victory") was a U.S. Army project proposed in May 1945 by Bell Laboratories, to develop a line-of-sight anti-aircraft missile system. The project delivered the United States' first operational anti-aircraft missile system, the Nike Ajax, in 1953. Many technologies and rocket systems used for developing the Nike Ajax were re-used in other projects, many given the "Nike" name (after Nike, the goddess of victory from Greek mythology). The missile's first-stage solid rocket booster became the basis for many types of rocket, including the Nike Hercules missile and NASA's Nike Smoke rocket, used for upper-atmosphere research. History Project Nike began in 1944 when the War Department demanded a new air defense system to fight jet aircraft that flew too high and fast for anti-aircraft guns. Two proposals were accepted: Bell Laboratories' Project Nike and General Electric's Project Thumper, a much longer-ranged, collision-course system that e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Las Trampas Regional Wilderness
Las Trampas Regional Wilderness is a regional park located in Alameda and Contra Costa counties in Northern California. The nearest city is Danville, California. ''Las Trampas'' is Spanish for ''the traps'', or ''the snares''. The park belongs to the East Bay Regional Park District (EBRPD). "Las Trampas Regional Wilderness." Retrieved September 19, 2014. General It consists of two long, hilly ridges (Las Trampas Ridge on the east and Rocky Ridge on the west) flanking a narrow valley along Bollinger Creek, which contains a horse stable and visitor parking. Some of the hiking trails include steep sections; they can involve as much as of elevation change. The park has been described as "the ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Bay Regional Park District
The East Bay Regional Park District (EBRPD) is a Special-purpose district, special district operating in Alameda County, California, Alameda County and Contra Costa County, California, within the East Bay (California), 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. As of 2020, EBRPD spans with 73 parks and over of trails. Some of these parks are wilderness areas; others include a variety of visitor attractions, with opportunities for human swimming, swimming, boating and camping. The trails are frequently used for non-motorized transportation such as biking, hiking, and horse riding. More than of paved trails (identified as Interpark Regional Trails) through urban areas link the parks together. History A destructive grass fire that broke out in Wildcat Canyon blew west into Berkeley on September 17, 1923, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alameda County, California
Alameda County ( ) is a List of counties in California, county located in the U.S. state of California. As of the 2020 United States census, 2020 census, the population was 1,682,353, making it the 7th-most populous county in the state and List of the most populous counties in the United States, 21st most populous nationally. The county seat is Oakland, California, Oakland. Alameda County is in the San Francisco Bay Area, occupying much of the East Bay (San Francisco Bay Area), East Bay region. The Spanish language, Spanish word ''alameda'' means either "a grove of poplars...or a tree lined street". The name was originally used to describe the Arroyo de la Alameda; the willow and sycamore trees along the banks of the river reminded the early Spanish explorers of a road lined with trees. Although a strict translation to English might be "Poplar Grove Creek", the name of the principal stream that flows through the county is now simply "Alameda Creek". Alameda County is part of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carquinez Strait
The Carquinez Strait (; Spanish: ''Estrecho de Carquinez'') is a narrow tidal strait located in the Bay Area of Northern California, United States. It is part of the tidal estuary of the Sacramento and the San Joaquin rivers as they drain into the San Francisco Bay. The strait is long and connects Suisun Bay, which receives the waters of the combined rivers, with San Pablo Bay, a northern extension of the San Francisco Bay. The strait formed in prehistoric times, near the close of one of the past ice ages, when the Central Valley was a vast inland lake. Melting ice from the Sierra Nevada raised the water level while seismic activity created a new outlet to the Pacific Ocean, draining the lake into the ocean and exposing the valley floors. Etymology The strait is named after the Karkin people ( in Spanish), a linguistic division of the Ohlone indigenous peoples who once resided on both sides of the strait. History Andrei Sarna-Wojcicki, a geologist emeritus of the US ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walnut Creek (Contra Costa County)
The Walnut Creek mainstem is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed October 20, 2020 northward-flowing stream in northern California. The Walnut Creek watershed lies in central Contra Costa County, California and drains the west side of Mount Diablo and the east side of the East Bay Hills. The Walnut Creek mainstem is now mostly a concrete or earthen flood control channel until it reaches Pacheco Creek on its way to Suisun Bay. Walnut Creek was named for the abundant native Northern California walnut trees (''Juglans hindsii'') which lined its banks historically. The city of Walnut Creek, California was named for the creek when its post office was established in the 1860s. History There are three bands of Bay Miwok Native Americans associated with early Walnut Creek, the stream for which the city of Walnut Creek is named: the Saclan, whose territory extended through the hills east of present-day Oakland, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Francisco Bay
San Francisco Bay (Chochenyo language, Chochenyo: 'ommu) is a large tidal estuary in the United States, U.S. state of California, and gives its name to the San Francisco Bay Area. It is dominated by the cities of San Francisco, California, San Francisco, San Jose, California, San Jose, and Oakland, California, Oakland. The San Francisco Bay drains water from approximately 40 percent of California. Water from the Sacramento River, Sacramento and San Joaquin River, San Joaquin rivers, and from the Sierra Nevada mountains, flow into Suisun Bay, which then travels through the Carquinez Strait to meet with the Napa River at the entrance to San Pablo Bay, which connects at its south end to San Francisco Bay. It then connects to the Pacific Ocean via the Golden Gate strait. However, this entire group of interconnected bays is often called the ''San Francisco Bay''. The bay was designated a Ramsar Convention, Ramsar Wetland of International Importance on February 2, 2013, and the Port ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Leandro Creek
San Leandro Creek () is a year-round natural stream in the hills above Oakland in Alameda County and Contra Costa County of the East Bay in northern California.U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed March 15, 2011 Geography It flows along the east face of the hills, east of Oakland and San Leandro. It runs into Upper San Leandro Reservoir and then Lake Chabot, both reservoirs are North of the unincorporated town of Castro Valley. It then flows through the city of San Leandro, and after crossing Hegenberger Road just north of Oakland International Airport on into San Leandro Bay of San Francisco Bay. Watershed Although it is channeled and culverted in places, it is remarkable among East Bay streams for being mostly uncovered throughout most of its course. It is joined by Indian Creek, and then at Upper San Leandro Reservoir it is joined by Moraga Creek, Redwood Creek, Buckhorn Creek and Kaiser Creek, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
