Sierra Club

Sierra Club is one of the oldest and largest U.S. environmental organizations, dedicated to exploring, enjoying, and protecting the wild places of Earth while promoting the responsible use of the environment. It organizes grassroots chapters, volunteer-led outings, public education, and campaigns focused on climate action, clean energy, public lands and biodiversity protection, and environmental justice. The organization advances change through advocacy, policy work, litigation, and community organizing, empowering members to take local and national action. Founded in 1892, Sierra Club blends outdoor recreation with civic engagement to build political power for conservation and sustainable policy.