Sierra Club, national organization in the United States dedicated to the preservation and expansion of the world's parks, wildlife, and wilderness areas. Founded (1892) in California by a group led by the Scottish-American conservationist John Muir, the Sierra Club is made up of more than 630,000 people devoted to the exploration, enjoyment, and protection of the natural environment. The club was instrumental in helping to create the National Park Service and the National Forest Service, as well as in the formation of individual recreation areas, such as Olympic and Redwood national parks. The group has also led efforts to obtain new parklands in Alaska. Through a program of court litigation and congressional action, the Sierra Club has opposed strip mining, the use of DDT, offshore oil drilling, hazardous wastes, and most other forms of chemical or aesthetic pollution. The Sierra Club has also broadened its program to include activities dealing with the urban environment, protection of tropical forests, and overpopulation. Through its almost 300 local groups, the Sierra Club sponsors a series of nature outings, and its national office, located in San Francisco, publishes a monthly bulletin as well as numerous books about ecology and the environment.
See Sierra Club, Guide (1989).