As of April 2011 Effigy Mounds National Monument will no longer be charging fees. Access to the visitor center, museum, interpretive film, trails, and ranger guided programs are all free. There is a donation box located at the front desk in the visitor center.
As a result of going fee free, Effigy Mounds National Monument can no longer issue The National Park and Federal Recreation Land Passes. Passes can be obtained through the mail or at participating recreation sites (704 KB PDF) that charge a fee. Always call ahead to ensure that the recreation site is able to issue the pass you are seeking.