Ultimate Survival Alaska

The Endurance team has a leg up in today's dog sled mission, as the other teams struggle to compete.

Mission: Chichagof Island. While one team heads for higher ground, another heads right for trouble.

Eager to pull ahead, the Endurance team takes a shortcut, quickly learning that it comes at a cost.

The 30 mile trek up and over the snow-covered Tordrillo Mountains proves problematic for all teams.

The teams pilot 50mi. of wild rivers; fight rapids know as Hell's Gate; and cut through thick brush.

The massive glacier's deadly climbs--and falls--prove to be harsh obstacles for all teams.

Two teams' tactics land then knee-deep in quicksand, while the other team wrestles a furious river.

The Mountaineers get into trouble when Tyler gets swept away out of sight while crossing Coal Creek.

The three enduring teams trek through 700 square miles of wilderness ruled by the Kodiak brown bear.

The tenth leg takes leads the teams to a lush temperate rainforest full of hunting opportunities.

The teams face the roughest challenge yet on their obstacle-laden trek to the Mt. Augustine volcano.

The competition clock has run out--who will be crowned the Ultimate Alaskan Survivors?