The Centennial Group
of Cobb/Cherokee/North Fulton

      and protect the planet


Clean Water
Smart Energy
Sustainable Communities
Get Involved
Recent Activities
Group Contacts

Other Important Links:

Local Government
Georgia Chapter, Sierra Club
National Sierra Club



The Centennial Group of the Georgia Chapter of the Sierra Club was organized in 1992, the one hundredth anniversary of the Sierra Club. Our members from Cobb, Cherokee, and North Fulton counties volunteer to educate, help, and encourage our fellow citizens to protect Georgia?? "!s environment for our children, grandchildren, and beyond.

We meet on the first Thursday of each month at Life University. We host a variety of programs relating to our goals or simply about Georgia's natural beauties. We also hold free outings for members and nonmembers.

NOTICE: There will be no regular
meeting on July 3

Instead, please join us on July 10 for our annual picnic Thursday evening at East Cobb Park - Pavilion #1 (3322 Roswell Rd., Marietta, GA 30068) 5:30 - 9:00 PM.

This is a family friendly annual event. Bring your children and neighbors. You do not have to be a Sierra Club member to join us. The fun will start at 5:30PM. We will gather for a short optional hike before we eat at 6:30. The group will provide beverages, burgers, and hot dogs (stainable meat only and vegetarian choices). Please bring a side dish and your own picnic utensils (cup, plate, bowl, fork, spoon, etc.) We will have extra on hand if you do forget, but please try to think green when preparing for the picnic. 

RSVP is appreciated, but not necessary. You can RSVP and sign up for food item at the link below. You can also sign up on Facebook.


We will be back at our regular location in August:

Life University
Room 311 in Upper Gymnasium
1269 Barclay Circle SE
Marietta, GA 30060

Click for directions to monthly meeting site in PDF format.

7:00pm - Social time and new member welcome
7:30pm - Program begins and lasts 1.5-2 hours

Visit our Calendar page for future meetings.

Centennial Group was well represented at the statewide retreat in 2013.

We have other areas of interest just waiting for citizens like you to join and help lead. You are invited to come to a monthly meeting to learn more about us, email us at

A group representative will get back to you.

Upcoming Events


Sunday, July 27, 2014 - Join us for a leisurely ride east from the Silver Comet Depot past Mile Marker 0 to the Silver Comet Extension and on to South City Kitchen restaurant in Smyrna. We'll arrive at the South City Kitchen in time for brunch after which we'll return to the depot. Our riding speed will be in the 8 to 10 mph range (easy).  We'll meet at the Silver Comet Depot (4342 Floyd Rd SW, Mableton, GA 30126) at 9:45 AM and leave promptly at 10:00 AM.
Sign up on our new meetup at


August 7- Member Jorg Voss, presents “Sex in the Garden”.
The book Sex in your Garden written by Angela Overy, inspired Jorg to develop a science-based presentation about Earth history, Life history and botanical evolution, with emphasis on the profound need of life to survive and procreate. We will learn about pollinators and see various plant families which nourish us and assure our survival.

September 4
- Ina Allison and Carina O’Bara provide an update on our “Adopt-A-Stream” program and the award-winning efforts of Centennial volunteers. Learn how you can get involved in the Adopt-A-Stream program.

- Join us for an interactive, sustainability discussion with Gigi Burke and our Panel of Representatives from local Universities and Organizations.

Join our Email List to Receive Information About Meetings and Events

To subscribe to the Centennial E-List and receive meeting reminders and the latest Group news, click on the "Subscribe" link below. Your preferred computer email program will prepare a message to send a request to subscribe to our mailing list. It is not necessary to fill in the Subject line. Just click send as you would usually do. If your reqest is sucessful, you will recieve a email response.


The Centennial Group is now on Facebook!!

It's true! The Centennial Group now has its own Facebook page.

Click the Facebook Icon to view our new page:

Go to our Facebook Page

Then click the Like button to become a friend and get updates and information.