Running the Antarctica Marathon: A Complete Guide

The first time I stood at a start line in the polar south, my breath froze on my buff before the gun even went off, and I understood that an antarctica marathon is unlike anything else in running. This is not a race you sign up for on a whim three months out. It is a years-long project, a small fortune, and one of the most extraordinary experiences a runner can chase. I have made the journey to the far south many times, and I have watched ordinary people from every walk of life cross a finish line surrounded by penguins, blue ice, and silence so complete it rings in your ears.

But here is the thing nobody tells you clearly: there is not one race down here. There are two utterly different events that both get called “the Antarctica marathon,” plus a third that is really a feat of endurance logistics. They cost different amounts, happen in different places, demand different training, and suit different runners. Confuse them and you can waste years on a waitlist for the wrong one, or arrive expecting penguins and instead find yourself at 80 degrees south with nothing but ice to the horizon.

In this guide I will walk you through both real marathons honestly: what they cost, when they run, how to enter, how to train, what to pack, and which one is right for you. I will not sugar-coat the price, because that would do you a disservice. This is the most expensive way to earn a medal on Earth. It is also, in my experience, worth every cold, exhausting, eye-wateringly expensive minute.

I.The two events everyone confuses: King George Island vs Union Glacier

Let me clear up the single biggest source of confusion before we go any further. When people say “I want to run a marathon in Antarctica,” they almost always mean one of two events, and they are not interchangeable.

The first is the Antarctica Marathon organised by Marathon Tours & Travel. It runs on King George Island in the South Shetlands, a sub-Antarctic island reached by ship across the notorious Drake Passage from Ushuaia, Argentina. The course loops on gravel, mud, and snow roads between research stations. It has been running since 1995 and comes as part of a cruise package. Technically, you are on an island off the Antarctic Peninsula, not on the continental mainland.

The second is the Antarctic Ice Marathon, organised by Antarctic Logistics & Expeditions (ALE). This one is run in the deep interior at Union Glacier, around 80 degrees south, on the actual continent. You fly from Punta Arenas, Chile, on an Ilyushin jet that lands on a blue-ice runway. It is held in December and is a fixture of the Seven Continents marathon quest. It is colder, higher, more remote, and considerably more expensive.

The third is the World Marathon Challenge: seven marathons on seven continents in seven days, with the Antarctica leg typically flown out near the Russian Novo base. That is a different beast entirely, and I will touch on it later for completeness.

II.The Antarctica Marathon on King George Island (the ship-based race)

This is the original and, for most first-timers, the more accessible of the two. The Antarctica Marathon has been organised by Marathon Tours & Travel since its inception in 1995, and they remain the proud event organizer and exclusive tour operator. You sail south from Ushuaia, cross the Drake Passage, and race on King George Island in the South Shetlands.

The course itself is genuinely tough. The racecourse winds along gravel roads linking the scientific bases of Uruguay, Chile, China, and Russia. You run loops past these stations on a surface that can be rutted gravel one minute and ankle-deep mud or snow the next. There is real elevation gain on each loop, the footing is treacherous, and the weather can turn in an instant. Both a full marathon and a half-marathon are offered, so you can choose your distance.

What I love about this race is the atmosphere. You are surrounded by fellow runners on the same ship, you share the Drake crossing together, and you get to do real Antarctic shore landings around the running. It feels like a community expedition with a race bolted on, rather than a clinical time trial. The scientists at the bases often come out to cheer, which is surreal and wonderful.

King George Island dates and how the schedule works

Dates shift year to year because everything down here bends to ice and weather. Recent editions have been scheduled around the southern summer shoulder season; the 2026 event has been listed for December and the 2027 event for January, with the marathon and half-marathon options on the same day. The race day itself is a small slice of a roughly 11-to-14-day cruise. Always confirm the exact date with Marathon Tours before you book flights to Ushuaia.

King George Island cost and what is included

Here is where you need to brace yourself. The entry is not a race fee, it is a cruise package, and it typically runs from around US$13,000 to US$19,000 or more per person depending on cabin category. That includes your berth on the expedition ship, all meals aboard, the Drake crossings both ways, shore excursions, and the race entry itself. It does not include your flights to Ushuaia, pre- and post-cruise hotels, travel insurance, or the inevitable gear you will buy. For a fuller breakdown of what an Antarctic trip really costs, I walk through the numbers in my guide to the cost of an Antarctica trip.

How to enter the King George Island race (and the brutal waitlist)

This is the part that catches people out. The Antarctica Marathon sells out years in advance. It is not unusual to find a multi-year waitlist. I have known runners wait three or four years from putting down a deposit to actually toeing the line. If you have a target year in mind, contact Marathon Tours & Travel now, get on the list, and be patient. Spots open as the calendar rolls forward, and being early on the list is everything.

III.The Antarctic Ice Marathon at Union Glacier (the real continent)

If you want to say you ran on the Antarctic mainland, this is the one. The Antarctic Ice Marathon is the southernmost marathon on Earth, taking place at ALE’s Union Glacier Camp just a few hundred miles from the South Pole in the interior of the continent. There are no penguins here. No ships. Just a horizon of white, the Ellsworth Mountains in the distance, and a runway carved straight onto blue ice.

You fly from Punta Arenas, Chile, on a converted Ilyushin jet. The landing on the blue-ice runway is something I will never forget. You step off into a world that feels closer to the surface of another planet than anywhere I have stood. The camp is a cluster of heated tents, the air is thin because of the altitude, and the cold is the kind that finds every gap in your layering.

The 2026 edition celebrates the 21st running of the event. It is scheduled for around the second week of December, with the race itself one day in a roughly week-long Antarctic stay. ALE also offers the Antarctic Ice Marathon 100k for the truly committed, run over the same terrain. This event is a cornerstone of the Seven Continents marathon quest, which is why you will meet so many people here chasing their final continent.

Union Glacier cost and what your money buys

Brace again. For the registration fee of around US$22,500, participants are flown round-trip from Punta Arenas to the Union Glacier camp in the interior. Competitors receive accommodation and food for their entire Antarctic trip plus entry to their race of choice. With single-supplement options and the higher cabin tiers, the all-in figure often climbs toward US$26,000 or more. As with the ship race, your flights to Punta Arenas, hotels, insurance, and gear sit on top of that.

Union Glacier dates and entry

The Ice Marathon runs in December every year. Field sizes are small because logistics in the deep interior are extraordinarily complex, so you should plan to book one to two years ahead at minimum. Register directly through ALE. Because the weather dictates flight windows, you must build slack into your travel plans on both ends. I have seen flights delayed by days waiting for a weather window, and that is simply the nature of the place.

IV.Which event is right for you?

I get asked this constantly, so let me be direct. Choose the King George Island race if you want the full expedition-cruise experience with wildlife, shore landings, and a sociable shipboard community, and if a damp, muddy, hilly course appeals more than a frozen one. Choose the Union Glacier race if your goal is to run on the actual continent, you are chasing the Seven Continents Club, and you can stomach both the colder conditions and the higher price.

• First-timer wanting wildlife and community: King George Island.
• Seven Continents finisher needing the “true” mainland: Union Glacier.
• Ultra runner wanting a 100k: Union Glacier.
• Tightest possible budget (relatively speaking): King George Island.
• Wants to combine running with kayaking, camping, and photography: King George Island cruise.

If you are still deciding what kind of polar trip suits you overall, my overview of things to do in Antarctica lays out the full range of activities beyond running.

V.The Seven Continents Club and why so many runners are here

A huge share of the people you meet at either race are working toward the Seven Continents Club, the goal of running a marathon on all seven continents. For most, Antarctica is the last and hardest piece because it is the most expensive and the most logistically daunting. There is no single official governing body, but completing a marathon on each continent is widely recognised, and finishing in Antarctica is the emotional crescendo of the whole quest. I have watched grown adults weep at the Union Glacier finish line because it represented a decade of saving and training. It is genuinely moving.

VI.Training for cold and uneven snow

You cannot train for these races the way you would train for a road marathon at home, and assuming you can is the most common mistake I see. The two enemies are cold and footing.

For footing, get off the pavement. Train on trails, gravel, sand, and if you can find it, snow. Your ankles, calves, and stabilising muscles take a pounding on uneven, soft surfaces, and pace goes out the window. I tell people to forget time goals entirely and train for time on feet instead. A four-hour road marathoner can easily take five, six, or more hours on King George Island mud or Union Glacier snow.

For cold, do as many of your long runs as you can in genuinely cold weather. Learn how your body and your layers behave when it is below freezing. Practise running with mitts, a buff over your face, and goggles. Learn to manage sweat, because getting wet and then cold is dangerous. If you live somewhere warm, you will need to be deliberate: cold-weather running camps, treadmill work in cold rooms, or travel to a cold climate before the race. The cold-weather conditioning that helps marathoners also serves anyone heading south for mountaineering in Antarctica, so the effort pays off in versatility.

A sample build for a polar marathon

• 12+ months out: secure your entry or waitlist spot, start building a strong aerobic base.
• 6 months out: shift long runs onto trail and uneven terrain; begin strength work for ankles and core.
• 3 months out: train in the cold deliberately, test full race kit on long runs.
• 1 month out: taper, finalise gear, practise dressing and undressing layers quickly.
• Race week: rest, hydrate, and accept that weather, not your watch, runs the show.

VII.Gear: shoes, spikes, and the layering that keeps you alive

Gear is not optional decoration down here. It is the difference between a great day and frostnip. Let me start with the feet, because that is where runners get it most wrong.

Shoes for ice and snow

For the Ice Marathon at Union Glacier, you want trail shoes with traction, and many runners add screws or small spikes for grip on compacted snow and ice. Some use lightweight crampon-style overshoes or screw hex-head sheet-metal screws directly into the outsole. Whatever you choose, test it for many miles before you travel. For the muddy King George Island course, aggressive trail-shoe lugs matter more than spikes, and you should expect to ruin a pair.

Layering, head, hands, and eyes

The golden rule is layers you can adjust on the move. A wicking base layer, an insulating mid layer, and a windproof outer shell let you regulate temperature as effort and weather change. For your head, a buff or balaclava to cover the face against windchill is essential, and goggles or wraparound glasses protect your eyes from glare and blowing ice. For hands, mitts trap more warmth than gloves; many runners wear a thin liner glove inside a windproof mitt.

• Feet: trail shoes with screws/spikes (Union Glacier) or aggressive lugs (King George Island), plus warm, wicking socks.
• Base: merino or synthetic wicking layer top and bottom.
• Mid: light insulating fleece or grid layer.
• Shell: windproof, breathable jacket and pants.
• Head/face: buff or balaclava, hat, goggles or glasses.
• Hands: liner gloves inside windproof mitts.
• Fuel: gels and snacks that will not freeze solid; insulated soft flask for fluids.

For a complete head-to-toe checklist that covers both the running kit and everything else you need on a polar trip, see my detailed guide on what to pack for Antarctica.

VIII.Altitude and cold at Union Glacier

Union Glacier sits at altitude, and that surprises people. The combination of thin air and deep cold means your usual marathon pace is simply not realistic. Temperatures hover around -10°C to -20°C, and windchill can drive the felt temperature far lower. At altitude your breathing is harder, your recovery between efforts is slower, and dehydration sneaks up because the air is bone dry. Give yourself grace. The goal is to finish safely, not to set a personal best.

I always advise arriving rested, hydrating aggressively in the days before, and starting conservatively. Frostbite risk is real on exposed skin, so the buff, goggles, and mitts are not for show. Listen to the ALE staff and medics; they know this environment better than anyone alive.

IX.Crossing the Drake Passage for the King George Island race

If you choose the ship-based race, you will cross the Drake Passage, the stretch of ocean between South America and Antarctica with a fearsome reputation for rough seas. Some crossings are the “Drake Lake,” glassy and calm; others are the “Drake Shake,” with swells that test your sea legs and your stomach. Either way, factor it into your training mindset: you may arrive at the start line having spent two days being tossed around at sea. Anti-seasickness measures are worth sorting before you sail. For the wider picture of how people physically reach the continent, my guide on how to get to Antarctica covers ships, flights, and the routes that matter.

X.The World Marathon Challenge: seven in seven

For the genuinely obsessed, there is the World Marathon Challenge: seven marathons on seven continents in seven days. The Antarctica leg typically starts the whole circus, flown out to a location near the Russian Novo base. It is a logistical marvel and a physical extreme that I would only recommend to seasoned, well-funded endurance athletes. It is not a substitute for the experience of either standalone Antarctic marathon, but it deserves a mention because people inevitably ask about it. If your dream is simply to run in Antarctica, the two dedicated races are the better, more immersive path.

XI.What race day actually feels like

Let me paint the picture. On King George Island, you transfer ashore by inflatable boat in the early morning, the air thick with the smell of sea and penguin colonies. The start is informal, the field small, and within minutes you are slogging through mud and gravel with the bases as your landmarks. The loops mean you see the same scientists cheering each time, and the camaraderie is electric.

At Union Glacier, the start is on a groomed snow track in eerie, perfect stillness. The cold bites immediately. Every footfall crunches. The course is a series of loops marked by flags, and the white emptiness plays tricks on your sense of distance. There is no crowd, just the wind and the occasional fellow runner appearing out of the glare. Crossing either finish line is a feeling I cannot adequately describe. It is pure, earned euphoria.

XII.Combining the marathon with the rest of your trip

One of the joys of the ship-based race is that the marathon is only one day of a longer expedition. Around the running you can do Zodiac cruises, shore landings, and on many voyages optional activities like sea kayaking and overnight camping. If you have the energy left in your legs, paddling among icebergs the day after a marathon is unforgettable; my guide to kayaking in Antarctica explains how that works. Spending a night ashore is another bucket-list add-on, covered in my piece on camping in Antarctica.

Many runners also become accidental photographers down here, because the light and the wildlife are simply staggering. If you want your finish-line and iceberg shots to do the place justice, my tips on Antarctica photography will help. And for those who want their trip to mean something beyond personal achievement, several voyages let you contribute to research through Antarctica citizen science programmes while aboard.

XIII.Best time to go and how seasons shape the races

Both races are pinned to the narrow Antarctic travel season. The ship-based race sits in the southern summer window when sea ice has retreated enough for vessels to reach the South Shetlands, while the Ice Marathon runs in December when ALE’s interior camp is operational and flight conditions allow. Understanding the season helps you plan flights, layovers, and the buffer days you will absolutely need. I break down the windows and trade-offs in my guide to the best time to visit Antarctica.

XIV.Budgeting honestly for an antarctica marathon

I want to be brutally honest about money, because false expectations ruin trips. An antarctica marathon is, dollar for dollar, the most expensive medal you will ever earn. Between the package, international flights, pre- and post-trip hotels in Ushuaia or Punta Arenas, insurance, and gear, the King George Island race realistically lands somewhere north of US$15,000 all-in, and the Union Glacier race often exceeds US$28,000 to US$30,000 once everything is tallied. Build a multi-year savings plan. Treat it like a major life purchase, because it is. The good news is that with years of lead time, that plan is entirely achievable for a determined runner.

XV.Insurance, fitness requirements, and safety

Both organisers require comprehensive travel and medical insurance, and for good reason: emergency evacuation from Antarctica is astronomically expensive and complex. Make sure your policy explicitly covers polar regions and evacuation. You will also typically need to demonstrate a baseline of marathon fitness and good health. These are not events for an untrained runner; the environment is unforgiving and there is no nearby hospital. Respect the conditions, train properly, and follow every instruction from the expedition and medical teams.

XVI.The cruise experience around the King George race

If you sail, you are essentially on an expedition cruise with a race in the middle. The ships are purpose-built for polar waters, with naturalists, lecturers, and expedition staff aboard. You will learn about the wildlife, history, and science of the region between landings. For a fuller sense of what these voyages are like and how to choose one, my overview of Antarctica cruises walks through the operators, ship sizes, and what to expect on board.

XVII.Common mistakes I see runners make

After many trips south, the same errors crop up again and again. Runners underestimate how much slower they will be on mud, snow, and at altitude, then panic mid-race when their pace collapses. They under-train on uneven terrain. They bring road shoes with no traction. They skimp on face and eye protection and suffer for it. They book flights with no buffer for weather delays and miss the boat or plane. And many simply leave entry far too late and lose years to a waitlist. Avoid all of these, and your trip will be transformed.

XVIII.Frequently asked questions

What is the difference between the Antarctica Marathon and the Antarctic Ice Marathon?

The Antarctica Marathon (Marathon Tours) is run on King George Island, a sub-Antarctic island reached by ship across the Drake Passage, on gravel and mud roads between research bases. The Antarctic Ice Marathon (ALE) is run on the mainland interior at Union Glacier, around 80 degrees south, reached by jet from Punta Arenas, on snow and ice. They differ in location, cost, climate, and how you arrive.

How much does it cost to run a marathon in Antarctica?

The King George Island race comes as a cruise package, typically around US$13,000 to US$19,000 or more. The Union Glacier Ice Marathon costs roughly US$22,500 and can exceed US$26,000 with supplements. Neither figure includes your international flights, hotels, insurance, or gear, so budget well beyond the headline price.

When does each race take place?

The Antarctic Ice Marathon at Union Glacier runs in December every year. The King George Island Antarctica Marathon dates shift year to year within the Antarctic travel season; recent editions have fallen in December, January, and historically around March. Always confirm the exact date with the organiser before booking flights.

Do I need to be an experienced marathoner to enter?

Yes. Both events require a baseline of marathon fitness, good health, and comprehensive insurance. The environment is harsh, the surfaces are difficult, and there is no nearby medical facility, so these are not races for a first-time or untrained runner. Train specifically for cold and uneven terrain.

How far ahead do I need to book?

For the King George Island race, expect a multi-year waitlist; some runners wait three or four years from deposit to start line. For the Union Glacier Ice Marathon, plan to book at least one to two years ahead because field sizes are small and logistics are complex. In short, start the process as early as you possibly can.

What shoes should I wear for an Antarctic marathon?

For Union Glacier’s snow and ice, trail shoes fitted with screws or small spikes for grip are the norm. For the muddy King George Island course, aggressive trail-shoe lugs matter more than spikes. Whatever you choose, test it over many training miles first, and expect the course to be hard on your footwear.

How cold does it get during the race?

At Union Glacier, temperatures typically sit around -10°C to -20°C, with windchill making it feel far colder, plus the effects of altitude. King George Island is milder, hovering near freezing but often damp and windy. In both cases, layering and face, eye, and hand protection are essential.

Can I count an Antarctic marathon toward the Seven Continents Club?

Yes. Completing a marathon on each of the seven continents is the goal of the Seven Continents Club, and an Antarctic marathon is the piece most runners save for last. Both the King George Island and Union Glacier races are widely recognised for this quest, with Union Glacier prized for being on the actual continent.

What is the World Marathon Challenge?

It is a separate event in which participants run seven marathons on seven continents in seven days, with the Antarctica leg typically flown out near the Russian Novo base. It is an extreme endurance feat for seasoned, well-funded athletes and is quite different from the immersive experience of the two dedicated Antarctic marathons.

Can I combine the marathon with other Antarctic activities?

On the ship-based King George Island race, absolutely. The marathon is one day of a longer expedition cruise, and many voyages offer Zodiac landings, sea kayaking, overnight camping, photography, and citizen-science opportunities around the running. The fly-in Union Glacier trip is more focused on the race itself, though the camp offers other interior experiences.

XIX.Final thoughts

Running at the bottom of the world is not cheap, easy, or quick to organise, and I will never pretend otherwise. It demands years of patience, a serious budget, and training that goes far beyond logging road miles. But standing at that finish line, breath frozen on your buff, the great white silence stretching around you, you will understand why people give years of their lives to this dream. Whether you choose the muddy, penguin-flanked loops of King George Island or the frozen, mainland purity of Union Glacier, an antarctica marathon will change how you see what your body and your resolve are capable of. Start early, train smart, spend wisely, and go. I promise you will never regret it.