How Long Does It Take to Climb All 8,000m Peaks in Nepal?

For a strong, well-funded, professional mountaineer climbing full-time, summiting all 8 of Nepal's eight-thousanders takes a minimum of 3 to 5 years. For the average serious amateur climber — someone who holds a regular job and climbs during annual leave — the realistic timeline is 8 to 15 years. And that assumes you don't get turned back by weather, injury, or the mountain simply saying no.

Only one human being has ever compressed the timeline for all 14 of the world's eight-thousanders (8 of which are in Nepal) into less than a year. Everyone else measured their progress in decades.

Why You Can't Just Line Them Up Back-to-Back

If you look at a map of Nepal and see eight dots marking the 8,000-meter peaks, your brain naturally wants to calculate a route. Fly in, climb one, drive to the next, climb that, repeat. How hard can it be?

Here is why that math doesn't work.

The weather window is brutally narrow. You can only summit most eight-thousanders during two short periods each year — the pre-monsoon spring window (mid-April to late May) and the post-monsoon autumn window (late September to October). Outside of those windows, the jet stream parks directly over the summits, creating sustained winds above 150 km/h that make climbing suicidal.

In a single spring season, you can realistically attempt one peak. Maybe two if they are geographically close and the weather cooperates perfectly — like pairing Everest and Lhotse, which share the same base camp and much of the same route. But climbing Everest in May and then immediately driving across the country to attempt Dhaulagiri in June is impossible. The monsoon arrives in early June and shuts everything down.

Your body needs months to recover. Summiting an eight-thousander is not like finishing a marathon where you are sore for a week and then back to normal. Extended time above 7,000 meters causes measurable damage to your cardiovascular system, your lungs, and your cognitive function. Professional climbers typically take a full 3 to 6-month recovery period between major expeditions. Stacking two eight-thousanders in the same season is physically possible, but it dramatically increases your risk of pulmonary edema, cerebral edema, and frostbite on the second peak because your body hasn't fully rebuilt.

Logistics eat time. Each expedition requires its own base camp setup, its own acclimatization rotation (usually 3 to 4 trips up and down the mountain over 4 to 6 weeks), its own weather window, and its own permit cycle. You don't just show up at the mountain and start climbing.

Nepal's 8 Eight-Thousanders: The Full List

Nepal is home to 8 of the world's 14 peaks above 8,000 meters. Here is what you are actually signing up for if you want to climb them all:

The Cold Math: If each expedition takes roughly 50 to 60 days, and you can only fit one (maybe two) into a single climbing season, you are looking at a minimum of 4 spring seasons to complete all eight. Add in the autumn attempts, weather failures, and recovery time, and you are realistically spending 3 to 5 years of your life on this project if climbing is your full-time job.

The Speed Records: Who Climbed Them the Fastest?

This is where the story gets genuinely insane.

Nirmal "Nims" Purja — All 14 Eight-Thousanders in 6 Months and 6 Days

In 2019, Nepali climber Nirmal Purja — a former Gurkha soldier and British Special Boat Service operative — launched "Project Possible." His goal was to break the existing speed record for climbing all 14 of the world's eight-thousanders. The previous record, held by South Korean climber Kim Chang-ho, stood at 7 years, 10 months, and 6 days.

Nims obliterated it. He completed all 14 summits between April 23 and October 29, 2019. Six months. Six days. Fourteen mountains above 8,000 meters. He summited six peaks in a single 31-day stretch during the spring season. The mountaineering world had never seen anything remotely close to this pace.

To put that in perspective: most professional climbers consider summiting two eight-thousanders in a single season to be an exceptional year. Nims did six in a month. The logistics alone — the helicopter transfers between base camps, the pre-positioned oxygen supplies, the coordination of permit windows — required a military-grade operational plan.

Reinhold Messner — The First to Complete All 14 (16 Years)

Before anyone was racing, Italian-Austrian climber Reinhold Messner was simply trying to prove it was possible. He summited his first eight-thousander (Nanga Parbat) in 1970 and completed the set with Lhotse in 1986. Sixteen years. And he did many of them without supplemental oxygen, which was considered borderline suicidal at the time.

Messner's timeline represents what the project looks like for a human being who has a life between expeditions — other climbs, writing books, recovering from injuries, and waiting for permits and weather.

Kristin Harila — The Fastest Woman (2023)

Norwegian climber Kristin Harila completed all 14 eight-thousanders in 92 days in 2023, shattering Nims's record. She paired with Nepali guide Tenjen "Lama" Sherpa and executed a relentless, back-to-back schedule across both Nepal and Pakistan. Her achievement remains one of the most compressed displays of high-altitude endurance ever recorded, though it generated significant debate within the mountaineering community about the role of supplemental oxygen and helicopter logistics in speed records.

The Age Records: Youngest and Oldest

Nima Rinji Sherpa — Youngest to Complete All 14 (Age 18)

In 2024, Nepali climber Nima Rinji Sherpa became the youngest person in history to summit all 14 eight-thousanders. He was 18 years old when he finished. Born into a legendary Sherpa climbing family — his father and uncles are veteran expedition operators — Nima Rinji grew up at altitude. He started climbing major peaks in his mid-teens and systematically ticked off the list while most people his age were finishing high school.

His achievement reframed the conversation about what "experience" means in mountaineering. 

He didn't have decades of climbing behind him. He had genetics, a lifetime of altitude exposure, and a family infrastructure that gave him access to expeditions that would take a Western climber years of fundraising to organize.

The Slowest Completions: Decades in the Making

On the opposite end of the spectrum, several climbers have spent 20 to 30+ years working through the list. Spanish climber Carlos Soria began his eight-thousander career in the 1990s and was still attempting his final peak (Dhaulagiri) into his 80s. His story is a testament to what the project looks like for a normal human: multiple attempts turned back by weather, years-long gaps between expeditions due to funding or injury, and the slow physical decline of aging working against you with every passing season.

The reality is that most people who set out to climb all 14 never finish. They run out of money, they suffer a career-ending frostbite injury, or they simply lose the psychological drive to keep returning to the death zone year after year.

The Realistic Timeline for a Non-Professional Climber

If you are a serious amateur — a corporate professional or small business owner who can take 2 to 3 months off per year for expeditions — here is what your project timeline actually looks like:

Years 1–2: The Foundation You climb your first eight-thousander. Most people start with Cho Oyu (8,188m) because it is technically the least demanding, or Manaslu (8,163m) because the permit costs are lower than Everest. You spend the off-season recovering, training, and saving money.

Years 3–5: Building the Resume You add one peak per year. You attempt Everest. Maybe you pair Everest with Lhotse in the same season since they share a base camp. If the weather cooperates, you knock out two in one spring. If it doesn't, you come home empty-handed and try again next year. That is the reality of high-altitude climbing — the mountain has veto power over your schedule.

Years 6–10: The Grind You tackle the harder, more remote peaks — Kangchenjunga, Makalu, Dhaulagiri. These are logistically heavier, more expensive, and more dangerous. A single failed attempt on Kangchenjunga costs you an entire climbing season and $30,000 to $50,000.

Years 10–15: The Final Push (If You Get There) You are left with the peaks you have been avoiding. For most climbers, this means Annapurna I — the peak with the highest fatality-to-summit ratio of any eight-thousander. Roughly one climber dies for every three who summit. You stare at that statistic and decide whether the project is worth your life.

The Financial Reality Nobody Talks About

Climbing all eight of Nepal's 8,000-meter peaks is not just a physical project. It is a financial one.

• Everest: $35,000 to $70,000 per attempt (depending on operator and service level).
• Kangchenjunga / Makalu / Dhaulagiri: $20,000 to $40,000 per attempt.
• Manaslu / Cho Oyu: $15,000 to $25,000 per attempt.
• Annapurna I: $25,000 to $45,000 per attempt.

Add in international flights, gear replacement (high-altitude boots and down suits wear out), insurance, and training costs, and you are looking at a total project cost of $250,000 to $500,000 USD spread across a decade or more. And that assumes you summit every peak on the first try, which almost never happens.

Frequently Asked Questions

Can I climb two eight-thousanders in the same season? 

Yes, but only certain combinations. Everest and Lhotse share a base camp and much of the climbing route up to Camp 3, making them the most logical pairing. Cho Oyu can sometimes be paired with a spring or autumn attempt on another peak if the timing aligns perfectly. Beyond those, the geography and logistics make same-season doubles extremely difficult.

What is the most dangerous of Nepal's eight-thousanders? 

Annapurna I. It has a fatality rate of roughly 30% — meaning for every 10 people who have reached the summit historically, 3 have died on the mountain. The south face is one of the most avalanche-prone walls in the Himalayas. It is always the last peak on a climber's list for a reason.

Do I need supplemental oxygen on all of them? 

The vast majority of commercial climbers use supplemental oxygen on peaks above 8,000 meters. A small number of elite alpinists have summited without it — Reinhold Messner famously climbed Everest without oxygen in 1978 — but going "oxygenless" dramatically increases your risk of cerebral and pulmonary edema. For a non-professional, supplemental oxygen is non-negotiable.

Has anyone climbed all 8 of Nepal's peaks in a single year? 

No one has isolated just Nepal's eight peaks as a standalone speed project. However, Nims Purja's 2019 record included all eight Nepali peaks within his 6-month, 6-day blitz of all 14 global eight-thousanders. So technically, yes — but only as part of a larger, unprecedented campaign.

Can I climb all 8 of Nepal's 8,000-meter peaks in one year?

Theoretically, yes. Practically, almost certainly not — unless you are operating at the absolute elite level of human mountaineering with a military-grade logistics team behind you.

Here is why the math barely works. Nepal's spring climbing window runs from mid-April to late May — roughly 6 weeks. The autumn window runs from late September to mid-October — roughly 3 to 4 weeks. That gives you about 10 usable weeks in an entire calendar year.

Each eight-thousander requires 4 to 6 weeks of acclimatization rotations before a summit push. So in a single spring season, you could realistically summit 2 peaks — maybe 3 if two of them share a base camp (like Everest and Lhotse) and you have pre-positioned camps, oxygen, and helicopter transfers between base camps already arranged. In autumn, you could add 1 or 2 more.

That puts your absolute ceiling at 4 to 5 peaks in a single year under perfect conditions. To get all 8, you would need two consecutive years of flawless weather, zero summit failures, and a body that refuses to break down after months of continuous exposure above 7,000 meters.

The only person who came close to this pace was Nims Purja, who summited 6 peaks in 31 days during his 2019 blitz. But Nims is a former Special Forces soldier with superhuman altitude tolerance, a dedicated helicopter shuttle system, and a multi-million-dollar support operation. He is not the benchmark for what a normal climber can achieve.

For a well-funded, full-time professional climber, 3 to 4 peaks per year is an aggressive but achievable pace. For everyone else, one peak per year is the realistic, sustainable target.

The Bottom Line

Climbing all 8 of Nepal's eight-thousanders is not a vacation. It is a decade-long, half-million-dollar life project that will test the absolute limits of your body, your bank account, and your relationships.

The fastest human did all 14 global peaks in six months. The first human to finish the list took sixteen years. Most people who start never finish.

If you are at the beginning of this journey — looking at your first 8,000-meter expedition — start with the right operator and the right peak. Check our [guided expedition packages for Manaslu and Cho Oyu] to connect with experienced, high-altitude certified teams who can get you safely to the summit and back. The first one teaches you everything you need to know about whether you want to do the next seven.