•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.

 

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. 

 

1. TRAILHEAD
  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.

 

2. INFORMATION KIOSK
  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.

 

3. THE DESERT SWAMP (A small sign marks the area on the left side of the trail)
 

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.

 

4. HANGING GARDENS
 

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. 

 

5. THE NARROWS (at the end of the Riverside Walk)
 

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. 

 

   

Flashflood

 

 

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.

Safety Issues - Watch for these signs of possible flash flooding:
 

Sudden changes in water clarity from clear to muddy (may be accompanied by floating debris)!

 

Rising water levels or stronger currents

 

Build-up of clouds or sounds of thunder

 

An increasing roar of water up-canyon

 

Any deterioration in weather conditions

 

Rock Squirrel

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?

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.
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.
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.

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