Orinda, California

Orinda Academy (OA) is a secondary school located in Orinda, California, United States.

Orinda station is a Bay Area Rapid Transit station in Orinda, California. The station has an island platform in the center median of State Route 24. Service at the station began on May 21, 1973, following the completion of the Berkeley Hills Tunnel, which connects it to Rockridge station. An abstract mural by Win Ng, partially covered by advertisements, is located in the fare lobby.In 2008, BART added solar panels over parking areas at Orinda station, as well as the Richmond and Hayward maintenance yards. The $3.8 million project was expected to provide all station electrical needs during daylight hours.The elevator to the platform is outside of the paid area. BART plans to add a dedicated faregate for the elevator in 2022.

Holden High School is a private, non-profit school located in Orinda, Contra Costa County, California, United States. Founded in 1969, it is accredited by the Western Association of Schools and Colleges and its diplomas are recognized by the State of California. The students are from all over the San Francisco Bay Area, and reflect the area's diversity.

On October 31, 2019, a mass shooting occurred in Orinda, California, during a house party that left five people dead and four others injured.

The Charles W. Merrill House is a 6,000-square-foot residence built in 1938 and located in Orinda, California. Designed by regionally prominent architect Walter H. Ratcliff, of Berkeley, California for mining engineer and San Francisco businessman Charles Washington Merrill.

The Maynard Buehler House in Orinda, California is a 4,000 square feet (370 square meters) Usonian home designed by Frank Lloyd Wright in 1948 for Katherine Z. "Katie" and Maynard P. Buehler. Since 2016 the house has been used as a venue for weddings, after being featured in Vogue magazine.

Glorietta is a former unincorporated community, now annexed to Orinda in Contra Costa County, California. It lies at an elevation of 597 feet (182 m).

Lamorinda is an area within Contra Costa County, California in the United States. The name is a portmanteau from the names of the three cities that make up the region: Lafayette, Moraga and Orinda.Lamorinda sits east of the Berkeley Hills between the Caldecott Tunnel and Walnut Creek. It is also referred to as the "Highway 24" corridor, referring to the state highway that is the primary thoroughfare in the region. Many residents commute west through the tunnel to San Francisco and Oakland or east to Walnut Creek and Concord. As of 2010 the three cities had a combined population of 57,552, with Lafayette having the largest population and Moraga the smallest.

Round Top is an extinct volcano in the Berkeley Hills, just east of Oakland, California. The peak lies entirely within the bounds of Contra Costa County. In 1936, the area surrounding the peak was established as Round Top Regional Park, one of the first three parks of the East Bay Regional Parks District. The park was renamed Sibley Volcanic Regional Preserve for the second president of the park district (1948 to 1958), Robert Sibley, shortly after his death in 1958. The eruptions that lead to Round Top started 10.2 Million years ago and ended more than a million years later. Two main vents of the old volcano are known, one is now under the Lawrence Berkeley National Laboratory, the other is Round Top. The Round Top vent has, over the years, fallen sideways.

Robert Sibley Volcanic Regional Preserve is located in the Oakland Hills of the East Bay region of the San Francisco Bay Area, California. The park is part of the East Bay Regional Parks District (EBRPD), covers 928 acres (3.76 km2), and lies east of Oakland, partly in Alameda County and partly in Contra Costa County. It can be entered from Oakland via Skyline Boulevard, or from Contra Costa County via Old Tunnel Road.

Huckleberry Botanic Regional Preserve is a 241 acres (0.98 km2) regional park and nature reserve in the Oakland Hills, in the eastern East Bay (San Francisco Bay Area) region of the San Francisco Bay Area of California. It is within Alameda and Contra Costa Counties. It is a park within the East Bay Regional Parks District system. The Preserve is named after the California Huckleberry (Vaccinium ovatum) which grows abundantly within its habitat.

The Black Hills are a mountain range in Contra Costa County, California.