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. With currents rushing at dangerous speeds, it's no easy feat to navigate the frigid waters.

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.

The men arrive at Nunivak Island in central Alaska. Mountain man Marty Raney and his son Matt search for fish but after three days and no luck the team is going hungry. With Marty seriously ill, it's up to his son to turn their luck around. Written by Anonymous

In this leg of the expedition, the eight survivalists paddle 40 miles through a minefield of icebergs and glaciers in Prince William Sound.

With only a few days left in the expedition, the survivalists travel to Admiralty Island, home to one of the densest brown bear populations in North America. The men arrive at prime feeding time.

On the final leg of their journey, the explorers summit a massive mountain of rock and ice in the Juneau Icefield. As a final farewell gift, Alaska throws a punishing winter storm their way.