The Sierra Club is the nation's largest and oldest grassroots organization with approximately 2.7 million members and supporters. We fight for clean air, clean water, and the preservation of the world's natural and wild spaces.
Founded by John Muir, one of the most influential transcendentalists of the 18th and 19th centuries, the Sierra Club began as a small in size organization advocating for the preservation of the Sierra Nevada region in California. In less than a decade they began to advocate for areas outside of California.
In 1950 The Atlantic Chapter became the first Club chapter outside of California. Over the next two decades, chapters were created in each state.