 | Hiking Spring Mountain, Nevada
A great hiking destination, Spring Mountain National Recreation Area is home to the world's oldest living tree, the bristlecone pine.
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| Ecology of a Mountain
By describing the importance of species interdependency, a biologist demonstrates that a mountain is more than the sum of its elevation.
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| Hiking Mount Rainier
A park ranger leads a hiking group to an awe-inspiring view of Mount Rainier - Washington's highest peak.
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| Dugger Mountain Wilderness - Diverse Species
The preservation of Alabama's Dugger Mountain Wilderness is a critical step in protecting the plants and animals that thrive there.
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| Adirondack Mountains - Glacial Evidence
A giant 'glacial erratic' boulder and a debris-dammed lake are evidence that glaciers once flowed across what is now the Adirondacks.
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| San Juan Mountains, Colorado - Subalpine Zone
Quartz crystals and fool's gold abound at an abandoned mine in the subalpine field of the San Juan Mountains, as do scores of wildflowers.
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| San Juan Mountains, Colorado - Aspen Grove
The San Juan Mountains in Colorado are part of the Rocky Mountain Range which feature craggy snow-covered peaks and dappled groves of aspen trees.
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| San Juan Mountains, Colorado - Alpine Lake and Meadow
Blue larkspur, yellow paintbrush, red mountain sorrel and delicate purple columbine flowers pepper the alpine meadow with color seen only in the summer.
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| Glacier National Park - Water, Rock and Ice
Named after the massive rivers of ice that carved its landscape, Montana's Glacier National Park supports a thriving alpine ecosystem.
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| Glacier National Park - Subalpine Meadow
Mountain wildlife is visible at Glacier National Park in Montana, including a hoary marmot and a family of mountain goats busily feeding on alpine grasses.
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| Siskiyou National Forest - Mountaintop
Oregon's Siskiyou National Forest, which sits at the crossroads of two mountain ranges, offers a great diversity of plants.
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| Mount Rogers, Virginia - White Top Mountain
When covered with snow, White Top Mountain, the second highest mountain in Virginia, gives an impression of the changes the landscape undergoes in winter.
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| Big Bend National Park - Chisos Mountains
Receiving more rain than the surrounding territory makes the Chisos Mountains in Big Bend National Park an inviting habitat for many species.
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| Haleakala, Hawaii - Volcano
Millions of years of volcanic activity have resulted in the dazzlingly-colorful and unique landscape of Mount Haleakala on the island of Maui.
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| Glacier National Park - St. Mary Lake
The views are endless at Montana's Glacier National Park, especially at St. Mary's Lake, where a variety of coniferous trees frame the clear alpine waters.
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| White Mountain, New Hampshire - Alpine Zones
The highest peak in the Northeast, Mount Washington in New Hampshire features alpine meadows and shrub-like 'krummholz' habitat.
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| Shenandoah National Park - Appalachian Trail
Virginia's Shenandoah National Park encompasses diverse mountain and forest habitats.
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| Lake Tahoe - Chaparral
The high altitude and dry climate of the hills surrounding Lake Tahoe are inviting to a few hearty shrubs and trees.
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| Denali National Park - Alpine Tundra
The high alpine tundra of Denali National Park offers spectacular views of the Alaska Range and a look at some hardy alpine plants.
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| Mount Rainier, Washington - Subalpine Meadow
Washington's tallest peak, Mount Rainier is not only a gorgeous sight to behold but also supports a thriving ecosystem on its subalpine meadows.
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| Mount Rainier, Washington - Alpine Zone
Alpine flowers abound on the summer slopes of Mount Rainier, a volcanic peak formed as a result of plate tectonics.
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| Mount Rainier, Washington - Glacier View
Pulled by the force of gravity, glaciers are rivers of ice that continually carve down mountainsides, altering the landscape.
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| Mount St. Helens - Blast Zone
The cataclysmic eruption of Mount St. Helens in 1980 left vast scars on the landscape still obvious today.
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| Mount St. Helens - Re-emerging Life
Not long after the violent Mount St. Helens eruption, life is returning to the region, especially near bodies of water.
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| Mount St. Helens - Debris Avalanche
Mount St. Helens' eruption sent rivers of volcanic debris flowing down the sides of the mountain, creating the landscape which is now being repopulated.
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| Mount St. Helens - Protected Ecosystem
A protective covering of snow on one side of Mount St. Helens allowed a number of plants and animals to survive the eruption.
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| Santa Catalina Mountains Ecosystems
Surrounded by the Sonoran Desert, the higher elevations of the Santa Catalina Mountains contain a variety of semi-arid and forest habitats.
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| Pine Forests of the Santa Catalina Mountains
The high elevations of the Santa Catalina Mountains are home to a mixture of ponderosa pine and conifer forests.
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| Mountain Building in the Desert - Part 1
The shaping and reshaping of the of the Sonoran Desert over millions of years has defined the weather and plant life of the region.
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| Alpine Tundra Above Juneau
The alpine tundra is a dramatic and fragile environment with sweeping views and delicate plant life.
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| History of Idaho's Wilderness Preservation
Find out how Idaho played a role in the origin and evolution of wilderness preservation in the United States.
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| Wilderness Preservation and Logging
Members of the logging industry present their points of view on how wilderness preservation affects their livelihood.
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| Wilderness Preservation and Forest Fires
Forestry officials discuss the role forest fires play in nature's cycles of renewal.
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| Steens Mountain in Winter
One of Oregon's most inaccessible mountains, the Steens embodies a dangerous yet pristine beauty.
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| Portland Mountain Rescue
Members of Oregon's Mountain Rescue team confront high altitudes, difficult trails and fluctuating temperatures to train for mountain emergencies.
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| Oregon's Wallowa Gondola
For a brilliant view and an exhilarating ride, sightseers take a trip up the Wallowa Mountains in a carefully-maintained gondola.
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| Paul Petzoldt - Mountain Climber
In 1924, Paul Petzoldt climbed the Grand Teton, and before long he had climbed the mountain more than any other guide.
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| Sawtooth National Recreation Area
Idaho's Sawtooth National Recreation Area was created as a compromise between recreationists and those who wanted to utilize the land.
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| Pine Mountain State Resort Park
Untouched forest and rolling mountains characterize Pine Mountain State Resort Park, which is available for the public to enjoy.
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| Climbing Mt. Jefferson
A video crew makes the difficult journey up the rocky slopes of Oregon's Mount Jefferson.
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| Wild Kiger Mustangs
Descended from Spanish horses brought to America in the 1600s, Kiger mustangs are as wild as deer in their native habitat.
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| The Grand Tetons - Geology and History
America's youngest mountain range, the Grand Tetons have been a source of inspiration since humans first set eyes on them.
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| Boomer: The Mountain Beaver
The seldom-seen Boomer, or Mountain Beaver, causes problems for the forestry industry by feasting on newly-planted seedlings.
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| Pack Goats
Most people may not realize that goats make excellent pack animals for carrying gear in mountainous territory.
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