Grizzlies, wolves and moose roam this terrain just 200 miles from the Artic Circle, but it is the altitude here that defines which wild conditions -- and creatures -- dominate.
Extreme Alaska: Building the Wild , Growing Glacier , An Alaskan glacier threatens a fishing village.
Extreme Alaska: Denali National Park , Ice Worms , Ice worms can be elusive in the Alaskan ice pack.
Extreme Alaska: Denali National Park , Denali High , North America's highest peak is an extreme place.
Extreme Alaska: Building the Wild,Army Corps Engineers boat in front of Hubbard Glacier.
Extreme Alaska: Building the Wild,Winter plateau with Brooks Range mountains in Alaska.
Extreme Alaska: Building the Wild,Norio Matsumoto snow cave in Denali.
Extreme Alaska: Building the Wild,The leading face of Hubbard Glacier with striated ice and a perched bird.
Extreme Alaska: Building the Wild,An aerial view of a snowy Alaskan Range.
Extreme Alaska: Building the Wild,Snow on the North Slope of Alaska during the sunset.
Extreme Alaska: Denali National Park,A grizzly bear looks towards the horizon.
Extreme Alaska: Denali National Park,Close-up of Dall sheep on top of Mount Margaret in Alaska.
Extreme Alaska: Denali National Park,Planes departing Denali Base Camp.
Extreme Alaska: Denali National Park,Moose.
Extreme Alaska: Denali National Park,The expedition team unloads their gear to set up camp.
Alaska covers more square miles than Texas, California, and Colorado put together. In fact, there is a glacier in Alaska so huge that it would nearly cover the entire state of Rhode Island.
Denali National Park alone covers over two million acres of primordial wilderness, an expanse larger than the state of Massachusetts.
Alaska hosts North America's highest peak and one of the coldest mountains on the globe, Denali, also known as Mount McKinley. It continues to grow at a rate of uplift of about 0.04 inches per year.
During the park's busiest five month season, over 400,000 tourists flock to see this famous mountain.
An estimated 100,000 glaciers cover five percent of Alaska, carving out the landscape into spires, valleys, and fjords.
There are more than 40 active volcanoes in Alaska and as many as 4,000 earthquakes of various depths are recorded in Alaska every year.
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