Membership in the Society is open to everyone, ranging from persons who have a professional interest in geology, to those with a casual interest in geology.


Yearly membership dues (suggested amounts) are:

Individual $35.00                Family $50.00                Student/Educator $20.00


Tuesday evening presentations are free to the public (donation suggested for non-members).

You must be a member of COGS, or a guest of a member, to participate in the field trips.

Membership runs from January 1st though December 31st

New memberships received after August 31st shall be applied to the remainder of the current year and the next calendar year.

COGS received 501(c)(3) certification from the IRS effective March 19,2018

Three ways to become a member

1) Download the membership form, then mail it & your check to Central Oregon Geoscience Society, P.O. Box 2154, Bend, Oregon 97709

2) Complete the following online membership application and pay via PayPal "Donate" button

3) Complete the online membership application and mail your check to  Central Oregon Geoscience Society, P.O. Box 2154, Bend, Oregon 97709


Making a Donation?


You can either include the donation with your dues payment or you can make a separate payment by check or via the PayPal "Donate" button (above). Please make a note on your check or in the "Write a note" field in PayPal so we know what the payment is for.

Thank you!