The Iron Guide of Rolwaling: Mingma G's Oxygenless Winter Triumph on K2

For thirty-three years, K2 in winter had stood as the ultimate unconquered fortress of high-altitude mountaineering. While the other thirteen eight-thousanders had gradually yielded to elite winter alpinists, the Savage Mountain repelled every attempt with terrifying ferocity. Hurricane-force jet streams exceeding 150 km/h, temperatures plummeting past −60 °C, and rockfall in the steep couloirs had crushed dozens of well-funded international expeditions from Poland, Russia, and Europe.

By 2020, many in the global climbing community wondered whether winter K2 was physiologically possible for human beings. But in the secluded Rolwaling Valley of Nepal, IFMGA master guide Mingma Gyalje Sherpa—widely known as Mingma G—held an unwavering conviction. Having survived a harrowing winter attempt on K2 the previous year, Mingma G knew that success would require flawless technical route-fixing, unyielding physical endurance, and absolute national brotherhood among Nepali climbers. Crucially, Mingma G made a quiet, personal vow: he would climb K2 in winter without supplemental bottled oxygen.

Fixing the Abruzzi in the Arctic Gale

Arriving at the frozen snout of the Godwin-Austen Glacier in December 2020, Mingma G led a tight-knit squad of Rolwaling climbers from his agency Imagine Nepal, consisting of Dawa Tenzing Sherpa and Kilu Pemba Sherpa. Joining forces on the mountain with Nirmal Purja’s Elite Exped team and Seven Summit Treks, the climbers established a unified front.

While others rested, Mingma G repeatedly took the sharp end of the rope on the most technical and perilous sections of the Abruzzi Spur. Through the sheer, frozen chimney of House’s Chimney at 6,600 meters and up the brutal, wind-scoured ice slabs of the Black Pyramid above 7,000 meters, Mingma G swung his axes into bulletproof water ice. Frostbite hovered on the edge of every fingertip, and his lungs burned with the cold air, yet his technical precision never wavered.

The Bottleneck Gamble

On January 15, 2021, the combined ten-climber Nepali team assembled at Camp IV on the Shoulder at 7,800 meters. The thermometer registered an astonishing −50 °C, and a fierce wind buffeted their tents. Mingma G sat in his down suit, resting without the benefit of an oxygen mask. While supplemental oxygen warms the body by accelerating metabolism, climbing without it in midwinter Karakoram conditions placed him at catastrophic risk of fatal hypothermia and frostbite.

At 1:00 AM on January 16, the climbers set out into the polar darkness. Ahead loomed the Bottleneck: a steep 50-degree ice couloir directly beneath a colossal, leaning serac wall over a hundred meters high. Climbing beneath the menacing mass of hanging ice that could collapse at any instant, Mingma G matched his breathing to the rhythmic crunch of crampons on hard ice. He helped fix lines across the traverse and into the final summit snow slopes.

A Unifying Triumph for the High Valleys

As afternoon fell across the Karakoram, the summit ridge came into view. Ten meters below the crest, the team halted. Gathering in the biting wind, they waited for all ten climbers to assemble. Linking arms and singing the Nepali national anthem, they stepped together onto the 8,611-meter summit of K2 at 4:58 PM PKT on January 16, 2021.

Mingma Gyalje Sherpa had conquered the Savage Mountain in midwinter entirely without supplemental bottled oxygen—a feat of pure physiological endurance that stunned the international mountaineering world. Together with his nine compatriots, Mingma G rewrote history, ensuring that the last great prize in high-altitude exploration was claimed by the indigenous sons of the Himalaya.