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Mount Sidley

Climb Mount Sidley

Antarctica's Highest Volcano

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.

12-DAY ITINERARY

Day 1

Fly to Antarctica

Day 2-3

Expedition Preparations

Day 4

Fly to Mount Sidley

Day 5-10

The Ascent

Day 11

Return to Union Glacier

Day 12

Return to Chile

Upcoming Departures

Jan 10, 2026
Jan 10, 2027
Full
Available

Climb Mount Sidley Camps

Crafted for the extremes, our Antarctic camps are a testament to precision engineering and logistical mastery. Whether you’re staying at Union Glacier Camp nestled by Mount Rossman, or traveling to one of our remote camps, each site is powered by renewable energy systems and supported by expert field staff trained in polar operations. Refined with our nearly half a century of experience in the interior of Antarctica, our camps are optimized for safety, sustainability, and a once-in-a-lifetime immersive experience.

A snowy campsite in Antarctica with colorful tents scattered across a white landscape, set against snow-covered mountains. Supported by Antarctic Logistics and Expeditions, the scene glows under a bright, partly cloudy sky with the sun shining.
Union Glacier Camp

Union Glacier Camp

A red tent partly covered in snow sits on a snowy Antarctic landscape under a clear blue sky, with a shovel and a ski pole nearby. The photo, taken from inside another tent, hints at the experience of Antarctic Logistics and Expeditions.
Field Camps

Field Camps

What’s Included

A large white check mark inside a solid green circle, symbolizing approval or confirmation—like a stamp of success on an Antarctic Logistics and Expeditions journey to the South Pole.
Airport transfers in Punta Arenas, Chile
A large white check mark inside a solid green circle, symbolizing approval or confirmation—like a stamp of success on an Antarctic Logistics and Expeditions journey to the South Pole.
Round trip flight to Antarctica from Punta Arenas
A large white check mark inside a solid green circle, symbolizing approval or confirmation—like a stamp of success on an Antarctic Logistics and Expeditions journey to the South Pole.
Meals and tented accommodation in Antarctica
A large white check mark inside a solid green circle, symbolizing approval or confirmation—like a stamp of success on an Antarctic Logistics and Expeditions journey to the South Pole.
Antarctic guides and lecturers
A large white check mark inside a solid green circle, symbolizing approval or confirmation—like a stamp of success on an Antarctic Logistics and Expeditions journey to the South Pole.
Celebration event and Certificate of Achievement
A large white check mark inside a solid green circle, symbolizing approval or confirmation—like a stamp of success on an Antarctic Logistics and Expeditions journey to the South Pole.
Checked luggage up to 55 lb (25 kg) plus skis

What’s Not Included

A large white letter X, reminiscent of Antarctic Logistics and Expeditions, is centered on a gray circular background.
Commercial flights to and from Punta Arenas
A large white letter X, reminiscent of Antarctic Logistics and Expeditions, is centered on a gray circular background.
Airport transfers outside of Punta Arenas
A large white letter X, reminiscent of Antarctic Logistics and Expeditions, is centered on a gray circular background.
Meals and accommodation in Punta Arenas
A large white letter X, reminiscent of Antarctic Logistics and Expeditions, is centered on a gray circular background.
Additional flights within Antarctica
A large white letter X, reminiscent of Antarctic Logistics and Expeditions, is centered on a gray circular background.
Personal equipment and clothing
A large white letter X, reminiscent of Antarctic Logistics and Expeditions, is centered on a gray circular background.
Expenses incurred due to delays
A large white letter X, reminiscent of Antarctic Logistics and Expeditions, is centered on a gray circular background.
Luggage over 55 lb (25 kg)
A large white letter X, reminiscent of Antarctic Logistics and Expeditions, is centered on a gray circular background.
Satellite phone charges
A large white letter X, reminiscent of Antarctic Logistics and Expeditions, is centered on a gray circular background.
Insurance coverage—personal, medical, evacuation, or otherwise

All About Mount Sidley

A true prize for pioneering adventurers, Antarctica’s tallest volcano and one of its most remote peaks awaits: Mount Sidley. Towering above the vast white expanse of Marie Byrd Land, this dormant giant offers a rare opportunity to explore untouched terrain where few have ever set foot. With its dramatic caldera, sweeping icefields, and sense of absolute isolation, Mount Sidley is more than a summit—it’s a bold step into the unknown, perfect for those seeking the ultimate off-the-map experience.

Learn More
Two people in winter gear hike on a snowy mountain ridge under a bright sun, with vast snow-covered landscape and distant peaks of Antarctica visible—an adventure reminiscent of Antarctic Logistics and Expeditions en route to the South Pole.
Two climbers in bright yellow and orange jackets stand on a snowy mountain summit in Antarctica, smiling and posing with arms around each other, against a clear blue sky and snow-covered landscape.
A snow-covered mountain with dark rocky patches in Antarctica is seen from an airplane operated by Antarctic Logistics and Expeditions, with the wing visible in the foreground under a clear blue sky.
Two bright red tents from Antarctic Logistics and Expeditions sit on a snowy landscape in Antarctica, with snow shovels nearby and a backdrop of snow-covered mountains and drifting clouds.
Snow-covered mountain landscape in Antarctica with a rocky foreground, icy terrain, and a thick bank of fog or clouds near the base—perfectly captured by Antarctic Logistics and Expeditions beneath a clear blue sky.

Prepare For Your Trip to Antarctica

How To Prepare For Climb Mount Sidley

Preparation Details

Book Now

Upcoming Departures

Jan. 04, 2026

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“

It was a great trip from the beginning with you to the plane at Punta with Rene. Outstanding could be the only comment that we could make.

Tom Crane
“

Thank you very much for helping me to get to Antarctica. It was a great trip and ALE was so well organized. I think I lost my soul to the ice.

Correne Coetzer
“

Now after some while I realize what a great time I had during the whole trip both in Chile and Antarctica. The delay we had was not a delay, it was anticipation of a real adventure and I enjoyed it too. I appreciate very much your efforts and professionalism in preparing and managing this very complicated logistic operation. I was even more pleased dealing with your team which creates very friendly and warm air in the cold environment.

Alexandr Drozdkov
“

I wanted to personally thank you and your team for a exceptional season on the ice. In my opinion the whole affair was faultless to a tee... even the bubbles in the champene you provided us on our return from the pole were of the correct diameter.

Jonathan Bradshaw
“

I have traveled for over 75 years to many extremely remote places and without a doubt Antarctic Logistics and Expeditions is the best logistics company I've ever worked with... If you want to travel to Antarctica and really see and experience the place, ALE is your best choice as a travel partner. They have my highest recommendation-5 STARS. “Thank You” ALE for exceeding all my expectations and giving me the experience of a lifetime.

Bruce D. Silversteign M. D.
“

Beginning with the entire onboarding process, the quality of the people at ALE stood out. From the early emails to the final pre-departure steps in Punta Arenas, each transition felt smooth and clear... From the perspective of the “adventure experience” I was awestruck every waking moment that I was there.

Jeff Jones