Ultimate Survival Alaska

The men pick their route: some take the higher land, some follow the river. These born racers are resolute to be the first to arrive.

The contestants build rafts after being split into two groups.

Helicopters leave the eight explorers on a snow-capped summit. The men split into three groups and approach a 300-foot cliff, descend a ravine and traverse eight miles of the Triumvirate Glacier.

The eight explorers are on the fourth leg of their expedition and are struggling to stay afloat on the Talachulitna River.

The explorers brave the dangers of Alaska's "Bear Highway" only to find themselves stranded and fighting to survive Mother Nature's fury on the shores of Katmai Bay.

Facing the brink of collapse, the eight starving explorers set out with one mission: harvest as much food as possible from the barren landscape of Nunivak Island.

In the frigid waters of the Prince William Sound, eight explorers battle a minefield of icebergs, glaciers, massive waves and powerful tides.

On day 32 of the expedition, the explorers traverse the Nizina River Valley, a vast expanse of land known for its lush wildlife, hungry grizzlies and homesteaders living hundreds of miles from civilization.

The explorers travel to Admiralty Island, home to the highest density of brown bears in North America, and it's not long before they receive a "grizzly" welcome.

On the last leg of the 3,000-mile journey across Alaska, the explorers battle a brutal winter snowstorm as they climb a 5,000 foot mountain in the Juneau ice field.