New members will need to submit a membership application. Membership will not be complete until we receive your application and payment.
Click button for the application and details.
Mail completed application to: Central Indiana Grotto, PO Box 153, Indianapolis, IN 46206-0153
Regular membership is limited to members of the National Speleological Society and include voting rights within the CIG.
Family members may join with dues equal to 50% of the regular member dues. They do not receive a newsletter. Family member (spouse or child) must reside in the same household as the regular member.
Associate membership is available to those not having membership with the National Speleological Society for a term of one year. At that time, they must join the National Speleological Society or be dropped from the Grotto’s list of members. Associates may not vote within the CIG.
Subscribers are not CIG members and have no voting rights, but do receive the monthly CIG newsletter.
For members renewing, renewal takes places during the first quarter, and only full year rates will apply.
(All rates listed below include applicable transfer fees.)
Make a one-time donation or make monthly payments.