Cimarron Group

Welcome to the Sierra Club Cimarron Group! 

The largest of Oklahoma’s three regional groups, Cimarron Group is based in Oklahoma City and serves  members in the northwest third of Oklahoma, including the OKC metro, Stillwater, Ponca City, Enid, Weatherford and all the way out to Guymon. Cimarron Group encompasses over 1400 members and communicates regularly with several thousand more supporters. We are all one Club—When you join Sierra Club, you will be a member of the National, State and Local entities. 


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