Mount Sidley

Be among the few to have climbed Antarctica’s highest volcano and one of the Volcanic Seven Summits. Join the ultimate mountaineering expedition to Mount Sidley 14,058 ft (4285 m) and stand atop one of the most remote summits on earth. Sidley is a huge mountain, set on the white expanse of the Polar Ice Sheet. This majestic peak features a 3 mi (5 km) wide caldera and sheer walled amphitheater, created by an explosive eruption 4.7 million years ago. Blue-ice slopes guard the upper mountain and fantastical snow mushrooms sprout along the upper ridge, leading to the summit. Mount Sidley was first climbed in 1990 by New Zealander Bill Atkinson and saw its second ascent in 2010 by an ALE guided team. Our team established a new route up the east ridge and traversed all three summits. Plenty of lines remain to be climbed and ALE continues to lead the way in exploring this remote peak in Antarctica.