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Membership in the Central Oregon Geoscience Society is open to everyone, ranging from people who have a professional interest in geology to those with a casual interest. All of our presentations are free to the public, with a suggested donation for non-members. Field trips are open to members only, or guests of members.

Your membership contribution supports our regular programs, including monthly presentations, field trips, and educational outreach.

If you would like to make an additional contribution in direct support of student research grants, K-12 education, or general programs, please visit the Donate page.

COGS is an exempt organization under Internal Revenue Code Section 501(c)(3), EIN: 82-5094856

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Central Oregon Geoscience Society

P.O. Box 2154,  Bend, Oregon 97709

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