The Sierra Club Toiyabe Chapter Records (1951 to 2021) are composed of files from Sierra Club officers and environmental activists in the Southern Nevada (formerly Las Vegas) Group of the Toiyabe Chapter. The collection documents the involvement of the Southern Nevada group in a variety of environmental concerns, such as air quality, transportation, urbanization, and nuclear issues, in which the chapter has expressed interest. The records are comprised of correspondence, memoranda, meeting minutes and agendas, newspapers, magazines, newsletters, pamphlets, press releases, legislation, recommendations, resolutions, and general information. Due to the group’s location in the heart of the Mojave Desert, the collection provides excellent case studies of significant changes in the post-World War II American environmental movement, notably the increased recognition of the worth of desert lands.