MAMMOTH CAVE NATIONAL PARK ACTIVITIES SCHEDULE. Please note: Reservations for tours are always recommended. Spring Break schedules for 2019 range from late March through mid-April. During these times the park will experience extremely high visitation and reservations may be the only way to ensure you will have a ticket for the tour you wish to experience. Please plan accordingly. Spring 2020 - Mammoth Cave National Park (U.S. National Park Service)
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