Concord is a city in California northeast of San Francisco. Nearby, Briones Regional Park features views of the Diablo Valley and a trail to Diablo Foothills Regional Park, with wildflowers and views of San Francisco Bay. A former coal-mining site, Black Diamond Mines Regional Preserve includes grasslands, pepper trees and lilies. The multi-use Iron Horse Regional Trail connects Concord to the city of Pleasanton.
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California, a western U.S. state, stretches from the Mexican border along the Pacific for nearly 900 miles. Its terrain includes cliff-lined beaches, redwood forest, the Sierra Nevada Mountains, Central Valley farmland and the Mojave Desert. The city of Los Angeles is the seat of the Hollywood entertainment industry. Hilly San Francisco is known for the Golden Gate Bridge, Alcatraz Island and cable cars.

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The U.S. is a country of 50 states covering a vast swath of North America, with Alaska in the northwest and Hawaii extending the nation?s presence into the Pacific Ocean. Major Atlantic Coast cities are New York, a global finance and culture center, and capital Washington, DC. Midwestern metropolis Chicago is known for influential architecture and on the west coast, Los Angeles' Hollywood is famed for filmmaking.

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