Colorado Sierra Club

Colorado Sierra Club We are a powerful collective of changemakers working together to protect CO's natural resources.

The Colorado Sierra Club is a powerful collective of more than 100,000 grassroots changemakers working together across the state to advance climate solutions, act for justice, get outdoors, and protect lands, water, air, and wildlife. We are an organization that believes in the power of working together to make change happen. As the Colorado chapter of the national Sierra Club, the largest and mos

t influential grassroots environmental organization in the U.S., together for over 126 years we have helped shape the way people can participate in local, state, and national advocacy and policy work, so that we can better protect the planet—and each other. We have a lot more change to make, because so much more is possible. We work alongside other local and national groups because we are more powerful together.

06/19/2026

Learn how to understand what is being proposed, how to prepare and submit an effective public comment, and how community voices can push utilities and regulators toward cleaner, more affordable, and more accountable energy decisions.

Colorado Renewable Energy Society (CRES)
Colorado Sierra Club

Big oil knew decades ago that their fossil fuel products could cause catastrophic consequences, but they lied to the pub...
06/18/2026

Big oil knew decades ago that their fossil fuel products could cause catastrophic consequences, but they lied to the public to protect profits. Today, they are lobbying Congress for blanket immunity from any laws or lawsuits that could hold them accountable for fueling the crisis.

Visit the link to join us in urging Congress to reject Big Oil’s call for immunity and to protect our right to hold fossil fuel companies accountable! https://act.sierraclub.org/actions/Colorado?actionId=AR0618801

UPDATE: Here are the Colorado Sierra Club’s 2026 primary election endorsements. Make sure you turn in your ballot or are...
06/17/2026

UPDATE: Here are the Colorado Sierra Club’s 2026 primary election endorsements.

Make sure you turn in your ballot or are prepared to vote in person! The primary election takes place June 30. View our endorsements webpage: https://www.sierraclub.org/colorado/2026-endorsements

On June 4 the Colorado Public Utilities Commission (PUC) declined to approved all $240 million of Xcel Energy’s proposed...
06/16/2026

On June 4 the Colorado Public Utilities Commission (PUC) declined to approved all $240 million of Xcel Energy’s proposed Gas Infrastructure Plan. The PUC found that Xcel’s plan did not adequately account for climate change and decarbonization policy.

This outcome was driven in part by advocacy from Sierra Club, Western Resource Advocates, Earth Justice, Southwest Energy Efficiency Project, and Rewiring America, as well as grassroots engagement organized by Sierra Club.

Read more: https://www.sierraclub.org/press-releases/2026/06/citing-cleaner-cheaper-alternatives-colorado-regulators-deny-xcel-energy-s

Last weekend staff and volunteer leadership got together to discuss and plan upcoming outings and the direction of our p...
06/12/2026

Last weekend staff and volunteer leadership got together to discuss and plan upcoming outings and the direction of our public lands work. We love connecting however we can but especially the opportunity to do so in person!

If you’re looking for ways to engage, fill out our volunteer interest form: https://www.sierraclub.org/colorado/volunteer

Hey absolutely everyone in the Springs! We're hosting a Here and Now Tour stop, which is a community listening session f...
06/11/2026

Hey absolutely everyone in the Springs! We're hosting a Here and Now Tour stop, which is a community listening session focused on the Make Polluters Pay campaign.

June 17th at 5:30PM at All Souls Unitarian Universalist Church (ASUUC)

RSVP here: https://actionnetwork.org/events/colorado-springs-here-now-tour-building-local-resilience-to-climate-disaster

The climate crisis is here and now – Colorado is already being hit hard by the impacts of an overheating planet - worsening wildfires, drought, pine beetle devastation of forests, 1,000 year floods, mudslides, and impacts to major drivers of our local economies, like agriculture and the winter sports industry. These disasters have already cost Coloradans billions of dollars in damages and adaptation measures.

A 2026 study by the Colorado Fiscal Institute shows that preparing for and responding to climate damages will cost Coloradans $1.5B on average per year moving forward through 2050. Polling in Colorado shows strong public support for ensuring that the biggest historic polluters, most responsible for the climate crisis, pay their fair share of these costs. With states facing budget shortfalls and additional cuts from federal funding, Climate Superfund laws can help reduce the burden on communities and taxpayers by raising revenue to pay for critical infrastructure needs and prepare for extreme weather events.

Climate Superfunds make the biggest historic fossil fuel corporate polluters pay their fair share into a fund that is used by the state and local communities to help cover damages from climate disasters and to support resilience projects. These projects can range from wildfire and flood mitigation, water conservation, heat pumps and efficiency measures to cool schools and homes, and resilience centers to support communities during heat waves and disaster events, with local micro-grids and solar and battery backup to provide essential electricity.

Vermont and New York were the first states to enact superfund laws in 2024. More than 10 states introduced versions of these bills in 2025, and several —California, Connecticut, Massachusetts, Maryland, and New Jersey—are moving forward.

It’s time to protect our community from the impacts of climate disasters, to build resilience and adaptation measures, and to make sure we build a stronger economy for the 21st Century and a safe, healthy future.

Here’s how you can help! Please join us to share your thoughts, learn more, and find out how you can support this effort.

Read more about how climate change is affecting western Colorado today and think on the question, “who absorbs this loss...
06/10/2026

Read more about how climate change is affecting western Colorado today and think on the question, “who absorbs this loss? And who will pay to fund to strengthen rural resilience?” https://www.gjsentinel.com/opinion/columns/a-stitch-in-time-investing-in-a-resilient-future/article_77509dfe-718b-4428-a28b-777571ea94df.html

At the Colorado Sierra Club, we are working to hold big polluters contributing to climate change accountable. If you’re ready to learn more about this, send us a message!

Feeling frustrated that individually we do all we can to slow down climate change but giant corporations aren’t being he...
06/09/2026

Feeling frustrated that individually we do all we can to slow down climate change but giant corporations aren’t being held responsible for their share of the harm? Us too, and we’re working to change that. https://www.sierraclub.org/colorado/calendar

Join us for an upcoming Here & Now Tour stop. We want to hear directly from you about the climate impacts you’re seeing and any adaptation measures needed throughout the state. Share these invites with your friends so we can hear from as many people as possible!

Address

1536 Wynkoop Street, #200
Denver, CO
80202

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

+13038618819

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