The Grotto accepts members on a rolling basis with initial membership requiring the following:

• Attend a minimum of 2 monthly meetings
• Attend a caving event with a Grotto member
• Approval from the executive committe

Yearly dues are collected to help cover the costs of GoToMeeting, Meeting Room, Website, Grotto Events, and to support other caving organizations.

Active membership provides many great benefits including:

• Access to the Great Saltpetre Cave Preserve
• Voting privileges
• Access to member only events