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The following
material provides background information on the area traversed by the
Riverside Walk. There is no general order in which to use the materials, and with
the exception of a few specific sights pointed out along the trail, this information was
designed to be used as a general summary of the natural and cultural history. Before beginning your hike, please review the
trail's physical and safety information in the Trail Guide section of the Zion Map
& Guide or the Self-Guided Hike
section of this website.
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Zion's unique
geographic location and variety of life zones combine to create a variety of
habitats for a surprising array of plant and animal species. Located on the
Colorado Plateau, but bordering the Great Basin and Mojave Desert Provinces,
Zion is home to plants from each region. Elevations range from 3600 to 8700
feet. Within these elevations the habitats are desert, canyon, slickrock,
hanging garden, riparian, and high plateau environments. With over 900
species, Zion National Park contains the highest plant diversity in the
state of Utah.
Along the
Riverside Walk you can observe two unique microhabitats within the riparian
habitat. The Hanging Gardens and the Desert Swamps are smaller life zones
where special conditions allow certain animals and plants to exist.
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| 1. |
TRAILHEAD |
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Yucca plants at the beginning
of the trail are a good place to talk about adaptations to the desert
environment. The shape of the leaf helps water to funnel down to the
roots of the plant. The thick waxy coating holds in the moisture and
the light green color absorbs less heat from the sun.
This was an
important plant for the prehistoric Indians of the Southwest. The
strong leaf fibers were used to make sandals, baskets, and rope. The
flowers and fruit were eaten and the root was used to make soap.
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| 2. |
INFORMATION KIOSK |
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One side explains Zion’s
geology. The other side explains how the Hanging Gardens formed and
how the Zion snail may have evolved.
There are Cottonwoods, Bigtooth maples, Boxelder and
Velvet ash trees along the trail. The Canyon grape is a vine that
grows on top of other trees for support and is abundant on this
trail. Although the fruit is edible, it has a poor flavor. Many of
the animals eat the fruit and people have used it to make jelly and
wine.
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| 3. |
THE DESERT SWAMP (A small sign marks the area
on the left side of the trail) |
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A contradiction in terms, this area occurs along
the trail where trees provide continuous shade and spring water
creates shallow pools among the tall grasses. This is ideal
habitat for amphibians, insects and birds. The Leopard
Frog, Canyon Tree frog, and Tiger Salamander can be found here during
the warm months. Woodpeckers and Brown Creepers are commonly
seen here. Scouring rush, Meadow horsetail, Cattails and
Duckweed are a few of the plants found here.
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| 4. |
HANGING GARDENS |
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The Navajo Sandstone is
extremely porous in nature allowing water from the top of the plateau
to travel down through the rock. When the water reaches a denser,
less porous material such as the Kayenta Formation, it cannot continue
its downward motion. Instead, the water is forced to move
horizontally and escapes along the sides of canyon walls at springs
and seeps. This area is known as the Zion “spring line” where hanging
gardens grow. The wet walls of the canyon allow algae and moss to
grow. Maidenhair fern are abundant, and flowers like Golden columbine
and Shooting stars grow out of cracks in the wall. The flowers
attract insects and birds. Black-chinned hummingbirds frequent this
area when the flowers are in bloom. The American Dipper nests in the
rocky outcrops among the hanging flowers which offer camouflage. This
bird can be observed standing on the rocks in the river and diving
under the water to get food.
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| 5. |
THE NARROWS (at the end
of the Riverside Walk) |
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According to geologists, during the last 15 million years the tiny
Virgin River has been primarily responsible for the carving of Zion Canyon.
As sediment is carried from above, the river acts like liquid sandpaper
cutting deeper into the canyon.
The canyon is 2000 feet
deep and at times only 20-30 feet wide.
The North Fork of the Virgin River watershed covers
more than 350 square miles. All the water from rain and snow that doesn’t
soak into the ground eventually flows into the river. A sudden thunderstorm
or heavy spring snow melt can dump enormous amounts of water into the Virgin
River, causing flash flooding.
The backcountry hike through
the Zion Narrows ends here, at the end of the Riverside Walk. The Zion
Narrows, a 16 mile hike in the shadow of the canyons soaring walls and
hanging gardens, can be an unforgettable wilderness experience.
However, this is not a trip to be
underestimated. There is no maintained trail. Approximately 80% of the
hike is spent wading, walking, and sometimes swimming in the river. The
current is swift, the water is cold, and the rocks underfoot are slippery.
Flash flooding and hypothermia can occur at anytime of the year. Good
planning, proper equipment, and sound judgment are essential for a safe and
successful trip. Before going on any backcountry hike in Zion National Park,
please review your plans and apply for a permit with a backcountry ranger at
the Zion Canyon or Kolob Canyons Visitor Center.
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Flashflood
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During a flash
flood the water level rises almost instantly, within seconds or minutes
along with large boulders and tree limbs. All
narrow canyons are potentially hazardous. Flashfloods, often from storms
miles away, present a real danger and can be life-threatening. By
entering a narrow canyon, hikers are assuming a risk.
The Virgin River’s flow is measured in cubic feet
per second (CFS). On a normal summer day, the CFS is around 60. During a
flash flood the CFS can quickly rise to several thousand. The most powerful
flash flood in Zion was recorded at 9000 CFS.
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Safety Issues -
Watch for these signs of possible flash flooding: |
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Sudden changes in water clarity from clear to muddy (may
be accompanied by floating debris)! |
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Rising water levels or stronger currents |
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Build-up of clouds or sounds of thunder |
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An increasing roar of water up-canyon |
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Any deterioration in weather conditions |
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Rock Squirrel
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Although you may see Mule deer
and Wild turkeys on this trail, the most common animal you will encounter is
the Rock squirrel. These squirrels are large gray rodents with bushy
tails that may run to meet you on the trail. These animals have
become aggressive because visitors feed them. Please help the park
rangers by explaining to your students why it is wrong to feed the wildlife.
WHY SHOULDN'T I FEED THE
ANIMALS?
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Wild
animals become unhealthy from eating human food and grow dependent on it as
a food source. Often animals that are fed become nuisances and must be
destroyed. It is also against the law to feed any wild animal.
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Feeding wildlife is dangerous. Small rodents can and will
bite the hand that feeds them, transmitting a variety of diseases.
Larger animals, such as deer, have been known to buck or kick suddenly
and cause serious injuries.
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If
you are watching an animal and it notices you, or changes its behavior
because of your activities, you are too close. Rather than attempting to get
that perfect photograph or get just one step closer, please step back and
enjoy your wildlife experience from a safe distance.
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Mother
deer sometimes leave their fawns alone for short periods of time as they
feed. As young fawns have no scent, they are safe from predators. If you
observe a fawn by itself, it has probably not been abandoned. Leave the fawn
alone, do not feed it, do not pet it, and do not try and catch it; its
mother will return.
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| Last Updated:
February 27, 2004 |
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