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Thursday, Aug. 7, 2014 12:01 am

Cool off in Mammoth Cave, the world’s longest

Mammoth Dome at the Mammoth Cave National Park rises 192 feet from floor to ceiling. Water dripping through a sinkhole hollowed out the dome, one of the highlights of cave tours.
Photo Courtesy the National Park Service


Jerry Brandsford knows a thing or two about Mammoth Cave National Park. You could even say his affinity for the massive cavern in central Kentucky runs deep.

Brandsford is the fifth generation of his family to introduce visitors to Mammoth, 360 miles from Springfield. If you are lucky enough to land him as your National Park Service tour guide, you will learn about Mat Brandsford, his great-great-grandfather, a slave who worked as a cave guide in the 1800s.

You also will learn that Mammoth has some 400 miles of surveyed passages and many more uncharted ones, making it the world’s longest known cave. Only 10 of those miles are open for tours, but taking even one of the 12 tours offered can give visitors a sense of the cave’s history and natural wonders.

The park became a World Heritage Site in 1981 and a core area of an International Biosphere Reserve in 1990. “The park gets 500,000 visitors a year with 400,000 of them going on cave tours,” according to spokeswoman Vickie Carson. She says visitors come from around the world and, while the park is open year round, summer months are the busiest and when the park offers the most tours.

A hot summer day is a great time to visit Mammoth as the temperature in the internal passages hovers in the 50s and 60s. Admission to the park is free but paying $5 to $24 for a tour is well worth the cost as that is the only way to enter the cave. Just be sure to reserve your tours if you go in the summer, when they fill up quickly, and bring a jacket and good walking shoes.

Visitors also should pay attention to the NPS repeated warnings about how difficult each tour can be before deciding if they want an easy, moderate or strenuous route. The most strenuous is the Wild Cave Tour, a six-hour excursion into miles of undeveloped passages requiring lengthy crawls through wet areas and tight openings.

Brandsford takes the lead three times a day, often on the two-hour, two-mile Historic Tour, a moderate choice popular with families. Visitors descend to the Historic Entrance, which Native Americans discovered thousands of years ago and pioneers found in the 1790s.

Evidence suggests that prehistoric people also explored and mined minerals from the cave, which was formed from leaks through the shale and sandstone cap to limestone below.

As tourists enter the cave, the temperature drops noticeably and the light diminishes. The first stopping point is 140 feet down to the Rotunda with a display of artifacts from the cave’s days as a nitrate mine. Slaves mined nitrate, used to make saltpeter, a key ingredient of gunpowder for the War of 1812. Brandsford points out the irony of slaves helping the cause of freedom, something they did not enjoy themselves.

Visitors exiting Mammoth Cave in central Kentucky pass through the Historic Entrance, where Native Americans and pioneers originally entered the cave.


The Historic Tour also includes the Bottomless Pit, where you can look down 102 feet; and Fat Man’s Misery, where tourists squeeze through tight passages with ducked heads. Many passageways are broad and high, but some may make claustrophobics cringe. The floor often is uneven.

Along the way, rangers explain the cave’s features, including names that have been scrawled on the walls and ceiling, sometimes with smoke from candles. A particularly poignant one is “Mat 1850,” the signature of Brandsford’s ancestor.

The guides also briefly turn off all lights during some tours so visitors experience the cave’s total darkness. A guide then strikes a match to show how even a small light can provide illumination.

Near the Historic Tour’s end is Mammoth Dome, 192 feet from ceiling to floor. Visitors ascend 155 steps to a passageway out of the cave.

Other tours include such highlights as the Frozen Niagara formation, one of the few areas with dripstones in the otherwise fairly dry cave system, and the Star Chamber, where a traditional illusion from early exploration is recreated on the ceiling.

The underground Styx River is visible on some tours when not flooded.     

Displays at the Visitors’ Center explain the cave’s one-time use as a tuberculosis hospital; it also was designated a fallout shelter in the 1960s. Brandsford says, however, that was not a wise choice as the cave continuously “breathes” in air from outside so any radioactive material would have made its way inside.

The park features 60 miles of hiking trails, fishing in the Green River, bicycle paths, scenic drives, camping, evening ranger programs and the Mammoth Cave Hotel and restaurants, open all year. Lodging also is available in Cave City or Park City near the park’s southern entrance.

See www.nps.gov/maca for more information about Mammoth Cave National Park. For tour reservations, call 877-444-6777 or go to www.recreation.gov. The park offers the least strenuous tours less often so they fill quickly. No cave tours are wheelchair accessible, but some aboveground trails are.

Mary Bohlen is a freelance writer and editor in Springfield and an emeritus journalism professor at the University of Illinois Springfield. She and Mary C. Galligan of Chicago alternate monthly columns on Midwestern travel for Illinois Times.

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