Welcome to the Cimarron Sierra Club Group, serving Oklahoma City and Northwest Oklahoma. 

The largest of the three regional groups, Cimarron Group is headquartered 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 about 1200 members and communicates regularly with several thousand more supporters. Cimarron Group general meetings (free and open to the public) are held the third Thursday of every month (except December) at the SixTwelve Community Center, 612 NW 29th Street in Oklahoma City – unless otherwise noted on the group website.


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