Piolet d'Or Winning First Complete Traverse of the 10km Mazeno Ridge of Nanga Parbat in Alpine Style2012-06-20 to 2012-07-25

2012 Sandy Allan & Rick Allen Nanga Parbat Mazeno Ridge First Complete Ascent

In July 2012, British mountaineers Sandy Allan (age 56) and Rick Allen (age 57) completed the historic first full ascent of Nanga Parbat's 10-kilometre Mazeno Ridge in pure alpine style over eighteen grueling days, crossing eight 7,000m summits to reach the top.

Country: Pakistan
Region: Gilgit-Baltistan / Diamer & Astore
Summit Date: 2012-07-12
Aerial panorama of the 10-kilometer Mazeno Ridge on Nanga Parbat, conquered by Sandy Allan and Rick Allen in 2012.
Photo by Guilhem Vellut / Wikimedia Commons / CC BY-SA 2.0
Editorially Verified
Historical Reference Record

Mountain Safety & Conditions Disclaimer: High-altitude climbing, glacial travel, and technical ascents entail severe objective risks including avalanches, serac collapses, rapid weather collapse, and altitude illness. Historical route descriptions and summit claims on Mountanity reflect documented archival sources and must not be used as live operational safety assessments. Local regulations, permits, and physical glacial topography change continuously.

Peer Review: Senior Editorial Board & Historical Reviewers • Editorial Standards

Published:
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Official Expedition Narrative & Archival Record

The Mazeno Ridge on Nanga Parbat (8,126m) was considered the longest, most intimidating unclimbed ridge on any 8,000-metre peak in the world. Stretching 10 kilometres from the Mazeno Pass to the summit trapezoid, it traverses eight distinct subsidiary peaks over 7,000 metres. In June 2012, an international team including Sandy Allan, Rick Allen, Cathy O'Dowd, and Sherpa companions Lhakpa Rangdu, Lhakpa Nuru, and Lhakpa Zarok set out along the ridge in alpine style. After eight days of grueling knife-edge mixed climbing and open bivouacs amidst storms, the team reached the Mazeno Col at 7,200 metres, where rations began running dangerously low. Recognizing the extreme physical toll, O'Dowd and the Sherpa climbers elected to descend down the Schell Route on the Rupal Face, leaving the veteran Scottish duo—Allan, aged 56, and Allen, aged 57—to push on alone. Out of food and melting snow with the last remnants of gas, Allan and Allen battled through extreme exhaustion, frostbite, and hallucinations. On July 12, 2012, after eighteen days on the mountain, Sandy Allan and Rick Allen reached the 8,126-metre summit of Nanga Parbat. Over the next three days, they completed an arduous descent down the Kinshofer Route on the Diamir Face, reaching safety after a twenty-one-day epic that was awarded the 2013 Piolet d'Or.

Documented Team Composition

  • Sandy Allan (United Kingdom, Summit Climber)
  • Rick Allen (United Kingdom, Summit Climber)
  • Cathy O'Dowd (South Africa, Team Member to Mazeno Col)
  • Lhakpa Rangdu Sherpa (Nepal, Team Member to Mazeno Col)
  • Lhakpa Zarok Sherpa (Nepal, Team Member to Mazeno Col)
  • Lhakpa Nuru Sherpa (Nepal, Team Member to Mazeno Col)
Organizing Bodies: The Alpine Club (UK), Mount Everest Foundation, Alpine Club of Pakistan
Verified Topographic Data

Key Statistics & Topographic Figures

Official Outcome
Piolet d'Or Winning First Complete Traverse of the 10km Mazeno Ridge of Nanga Parbat in Alpine Style

Expedition Status

Summit Date
2012-07-12

Ascent Timestamp

Target Objective
nanga-parbat

Mountain Peak

Ascent Route
nanga-parbat-mazeno-ridge

Climbing Path

Team Size
6 Climbers

High-Altitude Team

Region / Country
Pakistan (Gilgit-Baltistan / Diamer & Astore)

Geography

Historical Evidence & First-Hand Accounts

Archival Primary Source Quotations

“The Mazeno Ridge on Nanga Parbat (8,126m) was considered the longest, most intimidating unclimbed ridge on any 8,000-metre peak in the world. Stretching 10 kilometres from the Maze...”

— Sandy Allan (United Kingdom, Summit Climber) (2012)Source: Mountanity Verified Archives
Domain Glossary & Definitions

Defined Alpine Terminology & Concepts

Alpine Expedition
A planned, self-contained high-altitude mountaineering undertaking operating in remote mountain terrain subject to extreme objective hazards.
Death Zone
The high-altitude region above 8,000 meters where atmospheric oxygen pressure is inadequate for sustained human survival.
Citability & Knowledge Retrieval

Frequently Asked Questions: 2012 Sandy Allan & Rick Allen Nanga Parbat Mazeno Ridge First Complete Ascent

What was the primary outcome and achievement of the 2012 Sandy Allan & Rick Allen Nanga Parbat Mazeno Ridge First Complete Ascent?

Piolet d'Or Winning First Complete Traverse of the 10km Mazeno Ridge of Nanga Parbat in Alpine Style. In July 2012, British mountaineers Sandy Allan (age 56) and Rick Allen (age 57) completed the historic first full ascent of Nanga Parbat's 10-kilometre Mazeno Ridge in pure alpine style over eighteen grueling days, crossing eight 7,000m summits to reach the top.

When did the 2012 Sandy Allan & Rick Allen Nanga Parbat Mazeno Ridge First Complete Ascent reach the summit?

The expedition officially reached the summit on 2012-07-12, operating between 2012-06-20 and 2012-07-25.

Who were the documented climbing team members on the 2012 Sandy Allan & Rick Allen Nanga Parbat Mazeno Ridge First Complete Ascent?

The documented climbing roster included: Sandy Allan (United Kingdom, Summit Climber), Rick Allen (United Kingdom, Summit Climber), Cathy O'Dowd (South Africa, Team Member to Mazeno Col), Lhakpa Rangdu Sherpa (Nepal, Team Member to Mazeno Col), Lhakpa Zarok Sherpa (Nepal, Team Member to Mazeno Col), Lhakpa Nuru Sherpa (Nepal, Team Member to Mazeno Col).

What climbing route and mountain objective were tackled during the 2012 Sandy Allan & Rick Allen Nanga Parbat Mazeno Ridge First Complete Ascent?

The expedition tackled nanga-parbat via the nanga-parbat-mazeno-ridge in Pakistan (Gilgit-Baltistan / Diamer & Astore).

How are the records and summit claims of the 2012 Sandy Allan & Rick Allen Nanga Parbat Mazeno Ridge First Complete Ascent verified?

Summit claims, route topography, and timeline logs for the 2012 Sandy Allan & Rick Allen Nanga Parbat Mazeno Ridge First Complete Ascent are cross-referenced with official alpine registries, national mountaineering federations, and primary expedition journals.

Ascent Route & Topography

Mazeno Ridge Complete Traverse climbing route
🧗Extreme High-Altitude Ridge Traverse
Grade VI, ED, 10-kilometre sustained traverse above 7,000m, Scottish IV mixed ice
+3,926 m

Mazeno Ridge Complete Traverse

The Mazeno Ridge of Nanga Parbat is widely considered the longest and most demanding high-altitude ridge on any eight-thousander, stretching an unbelievable 10 kilometres in length and traversing eight subsidiary peaks exceeding 7,000 metres before meeting the final summit pyramid. Long dubbed the last great problem of the Western Himalaya, it defeated numerous elite expeditions over three decades until British veterans Sandy Allan and Rick Allen completed the first full integral traverse and summit push in pure alpine style over eighteen heroic days in July 2012.

Difficulty: Extremely Severe / Grade VI, ED, 10km crest, 5.8, Scottish IV
Prime Window: Late June to mid-July
Known Hazards: 4 major objective risks noted
View Detailed Topography

Target Objective Peak

The immense glaciated wall of Nanga Parbat under clear alpine sky.
🚩 7 Expeditions
8,126 m
First Ascent: July 3, 1953🧗 4 Routes

Nanga Parbat

Nanga Parbat, at 8,126 meters (26,660 ft), is the ninth-highest mountain on Earth and the western anchor of the Himalayas in Pakistan. It boasts the Rupal Face, the highest vertical precipice in the world at 4,600 meters from valley floor to summit. Known for profound climbing history, highlighted by Hermann Buhl's legendary solo summit without supplemental oxygen in 1953.

Explore Peak & Routes

Featured Expedition Climbers

Archival photograph of Scottish master mountaineer Rick Allen during an expedition on Nanga Parbat.
United Kingdom🏔️ 4 Peaks

Rick Allen

🏔️ 4 Verified Summits🚩 2 Documented Expeditions

Richard 'Rick' Allen was born in 1953 in Scotland. Growing up climbing the rugged sea cliffs and frozen gullies of the Scottish Highlands, Allen forged an extraordinary physical endurance and an understated, humble persona that made him a beloved legend among British mountaineers. Rejecting commercialized siege climbing, Allen devoted his life to exploratory, small-team alpine style in the world's highest mountains. Over a four-decade career, Allen climbed extensively across the Karakoram and Himalayas, establishing bold lines on peaks exceeding 7,000 and 8,000 metres. His finest hour arrived in July 2012 on Nanga Parbat (8,126m). Partnered with fellow Scottish veteran Sandy Allan, Rick Allen—then fifty-seven years old—tackled the unclimbed 10-kilometre Mazeno Ridge. Over eighteen continuous days living above 6,500 metres without supplemental oxygen and enduring days without food and water, Allen pushed through severe frostbite and temporary snow blindness to reach the summit on July 12, 2012. The breakthrough earned Allen and Allan the 2013 Piolet d'Or. In July 2018, while descending from a solo summit bid on Broad Peak (8,051m) in Pakistan, Allen slipped and fell from an elevation above 7,400 metres, sliding into an icy wilderness. Believed dead by climbers at Base Camp, Allen miraculously survived an open bivouac in freezing temperatures. Thirty-six hours later, Polish filmmaker Bartek Bargiel spotted Allen moving through the snow using a camera drone, guiding rescue climbers from Camp III to reach him alive in one of the first drone-assisted mountain rescues in history. In July 2021, while attempting a new lightweight route on the Southeast Face of K2 (8,611m) to raise funds for mountain charities, Allen was tragically swept away and killed by an avalanche at age sixty-eight. He is remembered as one of the purest, most resilient souls to ever touch the high Himalayas.

Key Milestone
First complete traverse of the 10-kilometre Mazeno Ridge on Nanga Parbat (8,126m) in pure alpine style with Sandy Allan in July 2012
View Climber Record
Aerial panoramic photograph of Nanga Parbat and the 10-kilometer Mazeno Ridge, conquered by Sandy Allan and Rick Allen in 2012.
United Kingdom🏔️ 4 Peaks

Sandy Allan

🏔️ 4 Verified Summits🚩 1 Documented Expeditions

Sandy Allan was born in 1956 in Dalwhinnie in the Scottish Highlands. Raised amidst the unforgiving winter conditions of the Cairngorms and Ben Nevis, Allan developed formidable ice climbing technique, relentless stamina, and a deep, intuitive understanding of mountain weather. Qualifiying as an IFMGA international mountain guide in 1989, Allan combined professional guiding across the European Alps with bold, small-team expeditions to the world's most formidable high-altitude objectives. Throughout the 1980s and 1990s, Allan built an extraordinary Himalayan record, summiting Mount Everest, Cho Oyu, and Lhotse, while attempting bold new routes on K2, Broad Peak, and Nanga Parbat. He formed a legendary partnership with fellow Scotsman Rick Allen, characterized by patient tenacity and complete self-reliance in remote terrain. In July 2012, at the age of fifty-six, Allan achieved his masterpiece on Nanga Parbat (8,126m). The Mazeno Ridge—an unbroken, heavily corniced 10-kilometre knife-edge crest spanning eight distinct summits over 7,000 metres—was considered the last great unclimbed problem on Nanga Parbat, having defeated dozens of world-class expeditions over thirty years. Climbing in pure alpine style without fixed ropes or supplemental oxygen, Allan and Rick Allen persevered through deteriorating weather, exhaustion, and running completely out of food and water. On July 12, after eighteen days on the ridge and eighteen bivouacs, Allan and Allen reached the 8,126-metre summit before executing a harrowing descent down the Diamir Face via the Kinshofer Route. The climb astonished the global climbing community and earned Allan and Allen the 2013 Piolet d'Or. In 2015, Allan published 'In Some Lost Place', which won the prestigious Boardman Tasker Prize for Mountain Literature, cementing his place among the immortal figures of British and international mountaineering.

Key Milestone
First complete traverse of the 10-kilometre Mazeno Ridge on Nanga Parbat (8,126m) in pure alpine style over 18 days with Rick Allen in July 2012
View Climber Record

Associated Historical Chronicles & Stories

Documented Sources & Archival Citations

  • In Some Lost Place: The First Ascent of Nanga Parbat's Mazeno Ridge(Sandy Allan / Vertebrate Publishing)

    Supporting claim: Boardman Tasker winning chronicle of the eighteen-day Mazeno Ridge traverse and summit

    Accessed/Documented: 2015
  • American Alpine Journal: Nanga Parbat, Mazeno Ridge, First Complete Ascent(Lindsay Griffin / American Alpine Club)

    Supporting claim: Official technical evaluation and timeline of the 2012 first complete ascent

    Accessed/Documented: 2013