Colorado Chapter

The Colorado Sierra Club is a powerful collective of grassroots changemakers working together across the state to advance climate solutions, act for justice, get outdoors, and protect lands, water, air, and wildlife. We believe in the power of working together to make change happen - and we're excited to have you with us!

 

Support Our Work in Colorado

Every day, we work to have cleaner air and water and protect Colorado's wildlife and wild places. Your gift supports our conservation, political, and legislative efforts, and 100% of your contribution stays right here in Colorado!

Donate 

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Volunteer With Us

Join our Public Lands team, the Safe Buildings Now team or our Legislative Advocates for Colorado's Environment team - or check out some other ways you can support our Chapter! 

Volunteer 

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Outings, Events, Emails and More

Wondering how to connect? Check out our calendar of upcoming events and join like-minded folks on a hike, a team meeting, or other event, and sign up to receive our newsletters.  

Upcoming Activities 

Join our Email List

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Colorado Chapter

The Colorado Chapter is the Colorado branch of the Sierra Club, America's largest and most effective grassroots environmental organization.

Who We Are

In 1964, the Colorado Sierra Club was established as a local chapter of the larger National Sierra Club, founded by John Muir in San Francisco in 1892.Today, the Colorado Sierra Club is 60 years strong. We have led the work on preserving 1.2 million...

What We Do

At the Colorado Sierra Club, we know that the health of our environment shapes the health of our communities. Our members work tirelessly to protect the earth’s vital resources, natural beauty, wild creatures, and scenic landscapes, and our voices...

Get Involved

Every day, the Colorado Sierra Club's volunteers, staff, and supporters work together to protect our air, water, wildlife, and wild places. Get involved! Join a volunteer team, attend an event, or make a donation to support our work for Colorado's...