Oklahoma Sierra Club

Explore, enjoy and protect the planet!

About Us

Statement of Purpose

"To explore, enjoy and protect the wild places of the Earth; to practice and promote the responsible use of the Earth's ecosystems and resources; to educate and enlist humanity to protect and restore the quality ofthe natural and human environment; and to use all lawful means to carry out these objectives."
Established in 1972, the Oklahoma Chapter of the Sierra Club has over 3,000 dues paying members in Oklahoma with monthly meetings in Norman (Red Earth Group), Oklahoma City (Cimarron Group) and Tulsa (Green Country Group).  Through the efforts of numerous dedicated volunteers and a small staff, the Oklahoma Chapter organizes frequent outdoor activities, social events, conservation activities, and educational outreach efforts aimed at furthering the mission of the Sierra Club. 

Standing committees at both the local and state level integral to the success of the Oklahoma Chapter include the Conservation Committee, Outings, Political Committee, and Legislative Committee.  From local food fairs and backpacking trips to film festivals and legislative lobbying, committee involvement offers opportunities to promote sustainability and environmental conservation with some of the most dedicated, kind-hearted folks in Oklahoma!

Over the years, the Oklahoma Chapter of the Sierra Club has successfully protected Oklahoma's wildlife, preserved its natural resources, and educated the public on many issues at the local, state, and federal level.  The volunteers and partners of the Sierra Club strive to be stewards of Oklahoma's environment and have a Proud History of Accomplishments

Whether you are interested in backyard gardening, canoe trips, or grassroots lobbying, the Oklahoma Chapter of the Sierra Club welcomes you to the oldest and largest environmental organization in the nation!  Join now, attend a local event, and help us Protect Oklahoma's Environment...For Our Familes, For Our Future.

Chapter (state-wide) Officers

Chapter Chair, CCL Delegate Barbara Van Hanken sophiabkv@aol.com
Past Chair, Political Chair, Conservation Chair Jody Harlan hwinc@cox.net
Chapter Membership Chair    
Secretary Bill McClelland BillMc3@cox.net
Treasurer, Nominating Committee Chair David Brown


Outings Chair Doug Hill isawwood925@aol.com
Legislative Committee Chair Susie Derichsweiler sderichsweiler@cox.net

Elected Members

  Jody Harlan hwinc@cox.net
  David Brown david7417@sbcglobal.net
  Barbara Van Hanken sophiabkv@aol.com

Group Delegates

Cimarron (Oklahoma City) Vicki Rose vicrose@roseranchjones.com
Green Country (Tulsa) Bill McClelland billmc3@cox.net
Red Earth (Norman) Joel Olson joel.olson@att.net

Oklahoma Chapter Staff

Whitney Pearson, Associate Field Organizer

A native Oklahoman, Whitney is an Associate Organizing Representative with the Sierra Club's National Beyond Coal Campaign. Whitney is a graduate of the University of Oklahoma and has been actively engaged with the Sierra Club and other environmental organizations since her university days. While at the University of Oklahoma, Whitney spearheaded the Campus Climate Challenge through the Sierra Student Coalition and OUr Earth. 
Subsequent to her graduation from OU, Whitney worked an associate at Pearson Public Affairs.  Whitney is focused on moving Oklahoma energy production and consumption beyond coal and emphasizing a clean energy economy in Oklahoma.


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