Sarah McNair Landry and her brother Eric share their story of kite-skiing the Northwest Passage in winter only to be hunted by polar bears.

Sarah McNair Landry and her brother Eric share their story of kite-skiing the Northwest Passage in winter only to be hunted by polar bears.

Kayaking legends Ben Stookesberry and Chris Korbuic accumulate together hundreds of first descents in the most dangerous rapids in the world; but the Lukuga River, in Congo, has left a particular mark on them.

Kayaking legends Ben Stookesberry and Chris Korbuic accumulate together hundreds of first descents in the most dangerous rapids in the world; but the Lukuga River, in Congo, has left a particular mark on them.

Jimmy Chin, who recounts his own story of how a class four avalanche transformed the way he approaches his work and life.

Jimmy Chin, who recounts his own story of how a class four avalanche transformed the way he approaches his work and life.

Justine Dupont prepares to ride big waves, but she has to face down fear and risk.

Justine Dupont prepares to ride big waves, but she has to face down fear and risk.

Will Gadd, a legendary climber who would stop at nothing to accomplish his goal of being the first to climb Helmcken Falls, a 430-foot frozen waterfall in British Columbia.

Will Gadd, a legendary climber who would stop at nothing to accomplish his goal of being the first to climb Helmcken Falls, a 430-foot frozen waterfall in British Columbia.

Travis Rice, a big-mountain freeride snowboarder, filmmaker and designer who survived a near-fatal avalanche while riding in the backcountry of Alaska.

Travis Rice, a big-mountain freeride snowboarder, filmmaker and designer who survived a near-fatal avalanche while riding in the backcountry of Alaska.

Conrad Anker, a renowned mountaineer and professional climber who suffered a heart attack while at 20,000 feet on Lunag Ri, the tallest unclimbed peak in the Himalayas.

Conrad Anker, a renowned mountaineer and professional climber who suffered a heart attack while at 20,000 feet on Lunag Ri, the tallest unclimbed peak in the Himalayas.

Gerd Serrasolses, a kayaker who was knocked unconscious after falling down a 50-foot waterfall while filming in Chiapas, Mexico.

Gerd Serrasolses, a kayaker who was knocked unconscious after falling down a 50-foot waterfall while filming in Chiapas, Mexico.