White-nose syndrome is considered to be present in the Mammoth Cave System.
While there are no known harmful effects to humans, the fungus Geomyces destructans, a fungus new to North America, is responsible for the deaths of more than 5.5 million hibernating bats across the eastern United States since its discovery in 2006.
Significant evidence indicates that humans can and have transmitted the fungus from one cave to another, hastening its spread. While no tours at Mammoth Cave National Park enter areas used by colonies of bats for hibernation, bats do occasionally fly through toured sections of the cave year-round.
On the remote chance that you might come into contact with Geomyces destructans spores during your tour of Mammoth Cave, all participants in Mammoth Cave National Park cave tours will be required to walk the length of an artificial turf mat to remove spores and dirt after exiting the Cave. We also ask for your cooperation by washing your hands and changing clothes and footwear before visiting any other caves or mines.
If you or other members of your party do not wish to comply or cannot comply with this requirement, we will be happy to fully refund your money; any tickets purchased online or through the reservation call center will, however, be subject to normal cancellation fees.
Your cooperation with this important measure will help prevent the possible spread of the fungus responsible for white-nose syndrome to other caves or mines. We apologize for any inconvenience, and thank your for helping to minimize the risk of spreading this disease so devastating to bats.