The linguistic divisions of Miwok people who resided in the western foothills Sierra Nevada Mountains, California (often sub-divided on maps as Northern Sierra Miwok, Central Sierra Miwok, and Southern Sierra Miwok)
a US organization that tries to protect the environment, especially natural areas such as forests, mountains, and rivers. The Sierra Club is also a social club for people who like to hike. U.S. organization for the conservation of natural resources, headquartered in San Francisco. It was founded in 1892 by a group of Californians, including John Muir, who wanted to sponsor wilderness outings in Pacific Coast mountain regions. As its first president, Muir initiated the club's involvement in political action on behalf of nature conservation. With branches in all 50 states, it works to educate the public on environmental issues and lobbies local, state, and federal agencies for environmental legislation
a country in West Africa between Liberia and Guinea. Population: 5,500.000 (2001). Capital: Freetown. Leonean. officially Republic of Sierra Leone Country, western Africa
a group of mountain ranges in Mexico. Principal mountain system, Mexico. It includes the ranges of the Sierra Madre Occidental (to the west), the Sierra Madre Oriental (to the east), and the Sierra Madre del Sur (to the south) all running roughly northwest-southeast. The Sierra Madre Occidental extends for about 700 mi (1,120 km), parallel with the Gulf of California and the Pacific Ocean; summits reach elevations above 6,000 ft (1,800 m), with some exceeding 10,000 ft (3,000 m). The Sierra Madre Oriental originates in the barren hills of the Rio Grande to the north and extends roughly parallel with the Gulf of Mexico for about 700 mi (1,120 km); it has an average elevation of about 7,000 ft (2,150 m) and reaches its highest point at Mount Peña Nevada (12,008 ft [3,660 m]). The sparsely inhabited Sierra Madre del Sur stretches through the southern Mexican states of Guerrero and Oaxaca, reaching elevations of about 6,500 ft (2,000 m), with a few peaks above 10,000 ft (3,000 m)
Mountain range, eastern California, U.S. The Sierra Nevada range extends more than 250 mi (400 km) from the Mojave Desert to the Cascade Range, and it averages about 50 mi (80 km) in width. The peaks of the range are 11,000-14,000 ft (3,350-4,270 m) high; Mount Whitney is the highest mountain. It is a year-round recreation centre and is easily accessed from the state's large urban areas