Cave Tours are offered daily except Thanksgiving, Christmas, and New Year's Day. All cave tours are ranger-guided and leave from the visitor center. Tickets are sold on a first-come, first-served basis. During the summer months long waits may be encountered. To avoid waits, the best time to visit the cave is during the early hours of the day. During the summer weekends are good times to visit; Tuesdays and Wednesdays are the busiest days.
The 13 Fee Free Days in 2013 include Martin Luther King Jr. Day (Jan. 21), National Public Lands Day (Sept. 28), and Veterans Day Weekend (Nov. 9-11). A full list of dates and participating agencies is listed below. The fee waiver does not cover expanded amenity or user fees for things such as camping, boat launches, transportation, or special tours. Visit Fee Free Days for more information.