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>Did You Know?
The multihued concentric circles that
emanate out from the blue center of
Grand Prismatic Spring are caused
by varying species of heat-loving
organisms. Each colored ring signifies a
different temperature and the different
thermophiles that can live there. To
survive in the harsh environments, the
organisms produce photosynthetic and
chemosynthetic pigments, which in turn
reflect specific wavelengths of visible
light, making them appear in a rainbow
of colors to the human eye.
>If You Go
Yellowstone is open year-round,
but services can be limited and
roads, trails, and attractions can be
closed or go unmaintained from
September through June because
of adverse weather. In the summer
months, heavy crowds can overwhelm
trails, parking areas, lodges, and
campgrounds. The park entrance fee
is $30 per vehicle and covers seven
calendar days. nps.gov/yell
Everywhere you look in Yellowstone
National Park, there’s evidence that
this mesmerizing landscape tiptoes an
invisible line between a steady sim-
mer and boiling over. Geysers. Mud
pots. Hot springs. he earth here
seems angry—bubbling, spewing, and
huing with barely controlled geo-
thermal energy. Don’t let anyone tell
you that fury can’t also be beautiful,
though. Exhibit A: Grand Prismatic
Spring. he third-largest hot spring
in the world, it’s more than 120 feet
deep, 370 feet in diameter, and a sear-
ing 160 degrees. But it’s the colors—a
deep blue center with rings of green,
yellow, orange, and red—that capture
everyone’s gaze. Fortunately, in 2017
the park opened the 0.6-mile Grand
Prismatic Spring Overlook Trail to
help visitors gain the bird’s-eye view
necessary for taking in the spring’s
full majesty.
LEAVE NO TRACE
Special places like the ones we’ve
highlighted here experience overuse and
abuse from the tens of thousands, if not
millions, of people who travel to see them
each year. If even a small percentage of
those folks disregard the tenets of leave no
trace—leave what you find, stay on defined
trails, dispose of trash and waste properly,
etc.—these paragons of the Western
landscape could be irrevocably damaged.
In 2014, for example, a tourist tried to get
an aerial view of Grand Prismatic Spring
using an illegal drone—which crashed into
the center of the pool. Learn how to be a
caretaker of the land by visiting lnt.org. m
G R A N D
PRISMATIC
SPRING
Yellowstone
N.P. WY
Garret Suhrie/Tandemstock