Cimarron Group (Oklahoma City and Northwestern Oklahoma)
- Meets on the second Thursday of each month at 6pm
- Location: OKC Beautiful Office, 1404 NW 1st Street, Oklahoma City, OK.
- Group Chair: Jessica Zimmerman - jnzimmerman3@gmail.com
- Cimarron Facebook Page: facebook.com/cimarronsierraclub
Green Country Group (Tulsa, Northeastern and far Southeastern Oklahoma)
- Meets on the fourth Thursday of each month at 6pm
- Location: Tulsa Garden Center, 24th and Peoria, Tulsa, OK.
- Group Chair: Katherine Haskell - greencountrysierraclub@gmail.com
- Green Country Group Website: sierraclub.org/oklahoma/green-country
- Green Country Facebook Page: facebook.com/SierraClubGreenCountryGroup
Red Earth Group (Norman and Southern Oklahoma)
- Meets on the fourth Thursday of each month at 7pm
- Location: Santa Fe Train Depot in downtown Norman (directly east of the railroad tracks and south of Main St.)
- Group Chair: Heather Supinie - REGsierraclub@gmail.com
- Red Earth Group Website: sierraclub.org/oklahoma/red-earth
- Red Earth Facebook Group: facebook.com/groups/27347387587
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