Trails: River Styx Spring, Echo River Spring, Sinkhole,
Heritage, Dixon Cave ,
and Green River Bluffs Trails
Hike Location: Mammoth
Cave National Park
Geographic Location: west of Cave City ,
KY (37.18710, -86.10111)
Length: 4.7 miles
Difficulty: 5/10 (Moderate)
Date Hiked: May 2017
Overview: A double loop featuring Mammoth
Cave ’s surface attractions.
Park Information: https://www.nps.gov/maca/index.htm
Hike Route Map: https://www.mappedometer.com/?maproute=732574
Hike Video:
Directions to the trailhead: This hike starts at the
Mammoth Cave National Park Visitor Center . To get there from points north, take I-65 to
SR 70 (exit 53). Exit and turn right on
SR 70. Where SR 70 turns left, continue
straight on SR 255 to enter Mammoth Cave
National Park . Drive a total of 5 miles from the interstate
to Mammoth Cave Parkway and
turn right on Mammoth Cave Pkwy. Mammoth Cave Pkwy.
deadends in 1.5 miles at the Visitor Center . From the south, use I-65 exit 48, turn left,
and drive first SR 255 and then SR 70 a total of 4.9 miles to Mammoth
Cave Parkway .
Continue straight on Mammoth Cave Pkwy.
to reach the Visitor Center
in another 3.1 miles.
The hike: Boasting over 400 miles of surveyed
passages, Mammoth Cave
in central Kentucky is the
longest known cave system in the world.
Although the cave was known to local people in prehistoric times,
the first Europeans to discover the cave were the brothers John and Francis
Houchin in 1797. The cave was mined for
saltpeter, a key ingredient in gunpowder, during the War of 1812, and by the
mid 1800’s commercial tours of the cave had begun.
In the
early 1900’s, the cave’s popularity led to the Kentucky Cave Wars in which
local landowners fiercely competed for the tourist dollars that cave tours
brought to the area. New cave entrances were
blasted so that more landowners could offer cave tours. In 1926, the United States Government
authorized Mammoth Cave
National Park to end the cave’s commercial
exploitation and put the cave in public hands.
By 1941, over 45,000 acres had been acquired for the national park. Most of the land was acquired by eminent
domain, an act that still harbors bitter feelings among area residents today. The cave and the land above it were named a
World Heritage Site in 1981 and an International Biosphere Reserve in 1990.
Relative to
other caves, Mammoth Cave ’s
main features are its long passageways and massive rooms. The cave has relatively few pretty cave
formations, and the cave’s name comes from its sheer size. Cave tours remain the area’s main attraction
today, and they are sufficiently popular that the National Park Service
recommends making advanced reservations.
I reserved a spot on the 3:15pm Domes and Dripstones Tour (note that the
national park is located in the Central Time Zone), thus choosing to tour the
park’s surface attractions by foot in the cool of the morning and go below
ground where the temperature is a constant 54 degrees in the heat of the
afternoon.
Because most cave tours depart from
the Visitor Center ,
the double loop described here is a logical route to hike while waiting for
your cave tour. This hike takes about
2.5 to 3 hours to complete in its entirety.
If you have less time than I did before your cave tour, you could hike
only one of the two loops. In such a
case, the first loop is longer but offers more to see than the second.
Trailhead behind Visitor Center |
After
exiting the back-left side of the Visitor
Center , look for the signs for the
Historic Entrance and trail system. The
hike starts by heading down a concrete path that passes under the pedestrian
bridge connecting the Visitor Center
and Mammoth Cave Hotel. The hotel
features a nice snack bar and ice cream parlor that I recommend patronizing after
your hike.
Snake crossing the paved entrance trail |
At 0.25
miles, you reach Mammoth Cave ’s
massive Historic Entrance. This entrance
is used by the national park’s Historic Cave Tour, and concrete steps with
metal railings lead down into the cave. This
cave tour features the Rotunda room, one of the largest rooms in Mammoth
Cave . The cool air wafting out of the cave is
refreshing on a warm summer day.
Mammoth Cave's Historic Entrance |
The
Historic Entrance also marks a major trail intersection. The second loop of our double loop starts to
the right on the Dixon Cave Trail, so you will be back here in a little over 1
hour. To start the first loop, continue
downhill on the River Styx Spring Trail, which soon turns from asphalt to
gravel.
The wide two-track
gravel trail treads downhill on a moderate to steep grade as it enters the Green
River floodplain, which lies roughly 220 vertical feet below the Visitor
Center . At 0.7 miles, you reach another major trail
intersection. We will eventually turn
sharply left here to begin the dirt Echo River Spring Trail, but first turn
softly left to walk the short boardwalk out to River Styx Spring. River Styx is one of Mammoth
Cave ’s major outlets for water, and
its level depends on water tables and the level of the nearby Green
River . The river was high
and cloudy on my visit.
River Styx Spring |
The next
0.8 miles use the Echo River Spring Trail as it heads for its namesake spring,
another major outlet for cave water. The
trail passes up and over River Styx Spring before descending to reenter the Green
River ’s floodplain. The
floodplain is populated with young forest that features some red cedar trees
and a dense green understory in season, which includes some poison ivy. Just past 1 mile, you pass what appears to be
an old spring house on the left, a remnant of the farms that once stood on this
land. The River Valley Trail exits left
just past this structure; stay right to remain on the Echo River Spring Trail.
Old spring house? |
At 1.5
miles, you reach the Echo River
and another trail intersection. This
hike turns left here to begin the Sinkhole Trail, but first take a short detour
straight ahead to see Echo River Spring, which looks less rocky and imposing
than River Styx Spring you saw earlier.
The trail continues past the spring to reach a parking lot near the Green
River Ferry, a rare active ferry-crossing of a major river, but it does not
loop back to the spring.
Echo River Spring |
Now on the
narrower Sinkhole Trail, the trail uses several switchbacks to climb the
slightly rocky hillside on a moderate grade.
The upland forest features tulip poplar, maple, and beech trees along
with a few hickories. I saw several wild
turkeys traipsing through the forest on my visit. 1.75 miles into the hike, you need to turn
left to remain on the Sinkhole Trail where another trail continues straight to
head for the Mammoth Cave Campground.
White's Cave |
Very
quickly you pass White’s Cave, a much smaller cave opening than the Historic
Entrance you passed earlier. The grade
eases as you head around and then up a finger ridge. At 2.1 miles, the River Valley Trail enters
from the left just before you reach Mammoth Dome Sink. An exceptionally large dry sinkhole, Mammoth
Dome Sink was formed when an underground cave tunnel collapsed, so the sink is
surface evidence of the cave system that lies beneath you.
Next the
Sinkhole Trail traces around the upper reaches of a ravine as the park’s
cottage area comes into view uphill and to the right. Just past 2.5 miles, you reach the ridgetop
and an intersection with the ADA-accessible concrete Heritage Trail. Turn left to begin a counterclockwise journey
around the Heritage Trail’s loop, and quickly reach Sunset Point. Perched more than 250 feet above the Green
River , Sunset Point offers a nice south-facing vista over the Green
River valley.
View south from Sunset Point |
Continuing
around the Heritage Trail, more nearly flat walking brings you to the close of
the Heritage Trail’s loop. Before
turning left to head back to the Visitor
Center area and close this hike’s
first loop, take the short spur trail to the right that leads to Old Guide’s
Cemetery. Though mainly a slave
cemetery, the burial ground does contain the grave of legendary guide Stephen
Bishop, who led cave tours here in the mid 1800’s.
Old Guide's Cemetery |
As you walk
out the “stick” of the Heritage Trail’s lollipop loop, look for the signed
start of the gravel Dixon Cave Trail that goes downhill to the left. If your cave tour is less than 1 hour away,
then the Visitor Center
is less than 300 feet ahead. Otherwise,
turn left to head down the Dixon Cave Trail and begin the second of our two
loops.
At the
bottom of some stone steps, you reach Mammoth
Cave ’s Historic Entrance for a
second time. Cross the paved River Styx
Spring Trail you walked down earlier to remain on the dirt/gravel Dixon Cave
Trail. After passing around a finger
ridge, you reach Dixon Cave
at 3.4 miles. Another large opening in
the ground, Dixon Cave
used to be connected to Mammoth Cave ,
but a tunnel collapse many years ago cut it off from the main cave system. An observation platform allows you to gaze
into the hole that is Dixon Cave
to see if it gazes back.
Dixon Cave |
Continuing
on the Dixon Cave Trail, ignore a side trail that exits right and heads for the
park’s picnic area. A little more
descending brings you to the end of the Dixon Cave Trail at an intersection
with the Green River Bluffs Trail, which goes straight and right. Turn right to begin the Green River Bluffs
Trail.
Hiking the Green River Bluffs Trail |
True to its
name, the Green River Bluffs Trail heads northeast parallel to the Green
River with the bluff rising to your right and falling to your
left. This trail is narrower than some
of the park’s other trails, so you need to mind the steep unprotected dropoffs
to your left. At 3.8 miles, you reach
this hike’s best Green River view. Perched nearly 150 feet above the river, the
overlook angles upstream at a point where few modern constructions intrude on
the view. Enjoy the broad view, the
highlight of this second loop.
Green River bluff overlook |
Past the
overlook, the trail curves right and climbs moderately to reach the top of the
bluff. Another right curve and some
level walking bring you to the Green River Bluff Trail’s upper trailhead at the
picnic area. Turn left to walk the
blacktop picnic area access road back to the Visitor
Center parking lot and complete the
surface portion of your tour of Mammoth
Cave .