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Nick Kalisz

Nelson was a role model to many young female adventurers. “In the niche of moms who pursue alpine adventures and strive to push their own limits always, she was my beacon," says Caroline George, who is a mountain guide. "She was my upward pull. She legitimized my choices to keep guiding and pursue adventures and be the best mom I try to be.”

Nelson, seen here skiing at 27,000 feet on Lhotse, combined steep ski skills with extraordinary physical endurance to pursue original adventures on many of the world's tallest peaks.

Morrison and Nelson make their way to a more exposed portion of the Icefall while on their way to Camp 2. The team was the only one on the glacier, which create an "incredible sense of vastness and solitude," says Nelson.

Nelson slowly climbs, amid heavy rock fall, through the Khumbu Icefall.

Nelson and Morrison make their way through a route above the Khumbu Icefall. It look the team 12 hours to get from Everest Base Camp to Camp 2 because of the new snow that had fallen.

Morrison skis off Lhotse's summit. The route was so steep that he dropped around 5 metres (15 feet) with each turn and the pair started a sluff slide, a flow of surface snow that runs like an avalanche but technically has no fracture point.