With 64 chapters and millions of members, Sierra Club is the largest environmental organization in the country.
We have the people power to get things done.
We protect wildlife and our public lands
We envision a world where everyone has access to clean air and water.
We have a long legacy of protecting America’s public lands and special places, the waters that flow through them, and the wildlife that depends on both.
HOW YOU CAN HELP
We fight climate change and corporate polluters
We envision a world where everyone has access to affordable and reliable renewable energy.
If we push our policymakers to take bold action to support clean energy, we can fight climate change, bring down energy costs, address racial inequalities, and create millions of green jobs in the process.
WHAT WE WON
HOW YOU CAN HELP
We get people outside to explore and enjoy our planet
We are the leader in environmentally-friendly adventure travel, offering an unparalleled selection of trips for people of all ages, abilities, budgets, and interests.
The Sierra Club Outings program provides environmentally friendly outdoor adventures—from Tahoe to Tibet—for people of all ages, abilities, and interests. Find a trip that feels like it was designed for you today.
Find Out More
We provide local opportunities to get involved
Your Chapter:
Sierra Club is powered by grassroots and community organizing as we work together to protect our air, water, wildlife, and wild places.
We rely on members and volunteers—like you!—to create opportunities for local involvement, activism, and outings. Find out more about how you can get involved and help us make a difference.
Learn More
Sign up for the latest environmental news and actions.
We produce award-winning environmental journalism
Sierra brings together leading writers and visual storytellers to report on the issues that matter most to our world.
We publish award-winning and cutting-edge reporting, in a quarterly print edition and every day online, dedicated to stories about exploring, protecting, and living in harmony with the natural world.
See Our Spring 2026 Isssue