Stewart Alexander Lowe was an American mountaineer known for difficult ascents on rock, ice, and high-altitude peaks worldwide. He established new routes in the Himalayas, Karakoram, and the Tetons, and made first ascents in Antarctica and on Baffin Island. In 1995, he received the American Alpine Club's Underhill Award for outstanding mountaineering achievement. Lowe was killed in an avalanche on Shishapangma in Tibet in 1999, during an expedition that aimed to produce the first American ski descent of an 8,000-meter peak. Lowe's remains were discovered in the glacier in 2016. The Alex Lowe Charitable Foundation was established in his name.