EVENT: The Imperiled Frosted Elfin Butterfly (Greater Hartford Group Monthly Meeting)

Wednesday, September 9, 2026 - West Harford, CT or Online

The Frosted Elfin Butterfly is rare and isolated to a small number of locations in Connecticut. In fact, it is being considered for listing as an Endangered Species. Fortunately, researchers at the University of Connecticut have been studying this fascinating species to understand its population size, habitat requirements, and methods for its protection. Read more and RSVP…

EVENT: Protect The Preserve at Old Saybrook Conservation Management Commission Meeting

Wednesday, September 16, 2026 -Old Saybrook, CT

Please plan to attend and urge protection of The Preserve. It’s one of Connecticut's largest remaining intact coastal forest ecosystems, supporting dozens of National Diversity Data Base (NDDB)-documented rare species, wetlands, vernal pools, headwaters to three rivers and wildlife habitat of statewide importance. Read more and RSVP and take action…

EVENT: Connecticut Climate Fest

Saturday, September 19, 2026 - Hartford, CT

Climate Fest will bring together community organizations and sustainable small businesses that are making a difference across Connecticut. It’s a chance to discover local organizations, meet inspiring people, learn about sustainability, and find ways to get involved right here in your own community. Read more and RSVP…

EVENT: Climate Week 2026 - Building People Power For Environmental Justice

Monday, September 21, 2026 - Hamden, CT

Real change happens when people come together. Join community partners for an engaging Climate Week gathering that brings together residents, organizers, advocates, students, and anyone passionate about building healthier, more equitable communities. Read more and RSVP…

EVENT: Hope in Hard Times: The Protect Wild Utah Story

Wednesday, September 23, 2026 - Online

Explore the history of the movement to protect America's Redrock Wilderness to demonstrate how a grassroots campaign can achieve real victory against government malfeasance. Read more and RSVP …

EVENT: Hartford Capitol Area System Climate Walk

Saturday, September 26, 2026 - Hartford, CT

Join us during Climate Week for a walk in Hartford to learn more about the Capitol Area System. It needs updating and replacing, and the Sierra Club is urging the State of Connecticut to lead by example and commit to a fossil fuel-free, 100% renewable solution. Read more and RSVP…

EVENT: Invisible Pollution: Connecticut's Compressor Stations & How to Fight Back

Monday, September 28, 2026 - Online

Join Sierra Club Connecticut for a webinar discussing the five methane gas compressor stations located throughout Connecticut in Brookfield, Oxford, Milford, Cromwell, and Chaplin, several of which are at threat of expansion. We will also discuss compressor station accidents in Connecticut. Read more and RSVP…

EVENT: Interested in Remington Woods Bus Tour & Community Meeting

Wednesday, September 30, 2026 - Bridgeport, CT

Autumn is one of my favorite seasons because it is one of the few times Remington Woods opens up for the public. At the end of September, Corteva will be holding an update meeting which includes a bus tour through the property. If you would like information about the tours and the meetings, please sign up! Read more and RSVP…

EVENT: Outings

Come take a hike with us! We have hikes for all levels, but many are for intermediate - advanced hikers so please read the description and be sure you are physically capable. Our volunteer leaders are some of the most experienced and accomplished hikers in Connecticut.

Join and get more information on hikes at CT Outdoors -- Sierra Club.

Bluff Point SP Fun Day - Saturday, September 12 - Groton, CT

Stay up to date with the Connecticut Chapter's events and meetings on our website or on Facebook. For more outings and hikes visit CT Outdoors - Sierra Club CT MeetUp page.