The Sierra Club Montana Chapter is locally run by a volunteer board (the Executive Committee, or "ExCom") elected by Chapter members. The Chapter works locally and coordinates with partner organizations and Sierra Club national campaign staff members to create change on the issues important in our state. Chapter volunteers and staff carry out campaigns to protect public lands, wildlife and waters, as well as to address the climate crisis by supporting a just transition from fossil fuel energy to clean, renewable energy sources. Volunteers can also learn to be citizen lobbyists and participate in each Montana Legislative session to effect change on the issues dear to our hearts, or they can volunteer with our Political Committee to get environmental and justice champions elected and hold politicians accountable. The Chapter offers outings and events, and we strive to support volunteer participation on many levels.

The Montana Chapter produces an annual (and sometimes semiannual) newsletter, The Montana Sierran. Members receive a copy in the mail.

Find us (and like us!) on Facebook (Montana Sierra Club) and on Instagram.

A waterfall tumbles over rocks in the foreground, as three hikres stand at the top looking at mountains in the background.

Executive Committee members:

  • Len Broberg, Chapter Chair 
  • Stacey Hellekson, Vice Chair
  • Anne Geiger, Secretary
  • Susan Evans
  • Melissa Hornbein

Our Teams:

  • Political Committee
  • Legislative Team
  • Climate & Energy
  • Conservation (Lands, Water, Wildlife)
  • Communications (Newsletter, Website, Social Media)
  • Outings
  • Finance
  • Fundraising & Membership
  • Nominations & Elections



Montana Chapter Staff:
Caryn Miske
 - Executive Director
P.O. Box 7201, Missoula, MT 59807

Caitlin Piserchia - Chapter Program Director
P.O. Box 7201, Missoula, MT 59807

Missoula National Staff:
David Merrill
- Senior Organizing Representative, Beyond Coal Campaign
P.O. Box 7201, Missoula, MT 59807

Bozeman National Staff:
Bonnie Rice 
- Wildlife Campaign Manager
P.O. Box 1290, Bozeman, MT 59771
424 E. Main Street, Suite 203C, Bozeman, MT 59771
(406) 582-8365

Interested in getting involved?

For more information about Montana Chapter activities and meetings, contact Caitlin Piserchia at caitlin.piserchia@sierraclub.org or (406) 544-4948.

A volunteer stands behind a table draped with a Sierra Club banner while someone signs a piece of paper on the table.