Most of the world’s glaciers are retreating. The Glaciar Perito Moreno, 78 kilometres west of El Calafate in Los Glaciares National Park, has long been one of the exceptions: its ice flows forward about two metres a day, calving into Lago Argentino in slow explosions that crack across the water like rifle shots, and for decades its front held steady while neighbouring glaciers retreated, though since about 2020 it has also begun to retreat. Scientists don’t have a fully settled explanation for why Perito Moreno behaves this way while its neighbours shrink. That scientific oddity, more than anything, is what makes it worth the trip.
What is El Calafate
El Calafate is a town of around 25,000 people in Santa Cruz Province, in the Argentine stretch of Patagonia. It sits on the southern shore of Lago Argentino at roughly 200 metres elevation and exists, in practical terms, to serve people going to see the glacier.
That’s not a criticism; it’s an accurate description of what the town is. The main street (Avenida Libertador) has hotels, restaurants, tour operators, and souvenir shops. The setting is dramatic: the lake is enormous and the mountains are visible in almost every direction. But El Calafate is a functional gateway town rather than a destination in itself, and the time you spend here is mostly organised around the glacier visits.
Glaciar Perito Moreno: why it matters
The glacier is around 30 kilometres long and 5 kilometres wide. The face that you see from the viewpoint walkways rises about 80 metres above the waterline, with an additional 170 metres below the surface. The glacier covers roughly 250 square kilometres in all. It’s part of the Southern Patagonian Ice Field, the third-largest reserve of fresh water in the world after Antarctica and Greenland.
Perito Moreno is unusual not just because its front held steady for so long, but because it periodically does something no other glacier on the planet does at comparable scale: it advances far enough across Lago Argentino to connect with the Magallanes Peninsula, effectively creating an ice dam that separates the lake into two sections. The pressure builds over months or years until the ice ruptures in a collapse that sends huge blocks of ice crashing into the lake and can last for hours or days. The rupture happens roughly every few years, though the interval is unpredictable, and draws crowds of people who camp by the viewpoints to watch.
Los Glaciares National Park was designated a UNESCO World Heritage Site in 1981. It covers 4,459 square kilometres and contains dozens of glaciers beyond Perito Moreno. The park is one of the largest in Argentina.
Getting to the glacier
The park entrance is 78 kilometres west of El Calafate, around an hour by road. Tours from town are the default option, running most mornings and including park transport, park entry fees, and a Spanish/English guide. The cost typically covers the walkway access but not ice trekking, which is booked separately.
Driving yourself is possible and gives you more flexibility over timing. The road is paved and straightforward. You pay the park entry fee at the gate separately from the ice trekking or boat options if you want those.
Park entry fees for international visitors are substantial; check current rates before budgeting, as they have risen significantly in recent years alongside broader Argentine price changes. The fee covers access to the walkways, which provide extensive views across the glacier face from multiple levels.
Glacier access options: what’s actually available
There are several distinct ways to experience the glacier, and the differences matter.
The walkway network is included with park entry. A system of elevated boardwalks and viewing platforms runs along the Canal de los Témpanos directly opposite the glacier face. The views are excellent: you’re 200 to 300 metres from the ice wall, and you can see the calving happen in real time. This is the option most people do, and it’s enough for many visitors.
Minitrekking is a guided walk of about an hour on the glacier surface, accessed by a short boat crossing from Puerto Bajo Las Sombras. You put on crampons and walk a prepared route on the lower glacier. The ice is blue-grey and deeply crevassed. You’re not in the wilderness; it’s a managed experience with a clear path, but the sensation of standing on the ice is genuinely different from looking at it from the walkways.
Big Ice is a longer ice walk of around four hours on the upper glacier, covering more varied terrain and getting further from the boat landing. It requires a reasonable level of fitness and comfort with altitude and exposure. Groups are smaller, the guides go further, and the experience is more physically demanding.
Boat tours (run by companies including Nautilus and Ríos de Hielo) sail close to the glacier face from Puerto Bajo Las Sombras. You see the scale of the ice from water level, which is different from the elevated walkway perspective. The boats get close enough that you hear the ice working: the creaking, cracking sound of a glacier in motion.
For most visitors without specific technical aspirations, the combination of walkways and one boat crossing covers the experience well. Minitrekking adds something real. Big Ice is for people who want more.
The rupture: when the ice dam breaks
The hydraulic cycle works like this: the glacier advances across the Brazo Rico arm of Lago Argentino until it contacts the Magallanes Peninsula, blocking water flow between the southern portion of the lake and the main body. Water backs up on the southern side, raising the level by several metres. Eventually the pressure is enough to melt through or collapse the ice, and the rupture begins.
The collapse can be gradual (a slow widening of the breach over days) or sudden (a dramatic wall of ice falling in one event). Watching the rupture, when it happens, is described by everyone who’s seen it as one of the more powerful things you can witness in Patagonia. But it can’t be scheduled. The last several ruptures have occurred at intervals ranging from one to several years, and some recent years have seen no rupture at all. If you’re visiting specifically to see it, the honest advice is to check recent news before going and build flexibility into your plans.
Other glaciers in the park
Perito Moreno gets all the attention, but it’s not the only glacier in Los Glaciares. Boat trips from Puerto Bandera (about 45 kilometres west of El Calafate) reach the Upsala Glacier (one of the largest glaciers in South America, around 870 square kilometres, and currently retreating) and the Spegazzini Glacier, which has a dramatically tall face of over 130 metres. The full-day excursion includes both.
These boat trips are worthwhile but quite different from Perito Moreno. You see the glaciers from the water rather than from walkways, and the landscape, a labyrinth of icebergs floating in grey-blue water, is atmospheric rather than dramatic in the same immediate way. They suit people who want the broader context of the Patagonian ice field beyond the single famous glacier.
El Chaltén and Mount Fitz Roy
El Chaltén is a small mountain village about 215 kilometres north of El Calafate via Ruta 40 and Ruta 23, a paved road that takes about three to three and a half hours to drive. It’s the access point for Mount Fitz Roy (3,405 metres) and Cerro Torre (3,128 metres), two of the most photographed mountain peaks in the world.
El Chaltén itself is smaller and more focused than El Calafate: it’s effectively a trekking hub with hostels, a few restaurants, and trail heads that begin within walking distance of town. The main hike to the Fitz Roy viewpoint (Mirador Laguna de los Tres) is a full day and involves around 1,000 metres of elevation gain, but the view of the granite needles reflected in the lake is as dramatic as any mountain scenery in South America.
Day-tripping El Chaltén from El Calafate is possible: buses run daily, but it’s a long day and you arrive with only a few hours before the return bus. Staying one or two nights in El Chaltén is a different experience and far more satisfying. If you’re going to make the journey, give it the time it deserves.
What to do in El Calafate town
The town has more than you might expect for somewhere its size.
The Laguna Nimez Ecological Reserve, at the edge of town by the lake, has a walking trail through wetlands that hosts flamingos, black-necked swans, and other Patagonian birdlife. The flamingos are there year-round but most visible in summer and early autumn. It’s a good early morning walk.
The Centro de Interpretación Histórica has exhibits on the indigenous peoples of Patagonia, the European settlement of the region, and the natural history of the ice field. It’s a worthwhile hour for context before visiting the glacier.
Lago Argentino itself is strikingly large: 1,415 square kilometres, the largest lake entirely in Argentina. The waterfront along the southern shore of town has a walkway and views of the lake. In good weather, the light on the water in the late afternoon is excellent.
When to visit El Calafate
The park is open year-round, and the glacier is accessible in all seasons; in fact, some visitors prefer winter because the crowds are thinner and the cold intensifies the experience. But Patagonian winters (June–August) bring short days, unpredictable storms, and some tour operators closing for the season.
The main season runs October through April, with peak crowds in December and January (Argentine summer holiday). December and January are also the most expensive months for flights and accommodation.
October and November are increasingly recommended: the weather is improving, the crowds are below peak, and accommodation prices are reasonable. March and April see good weather, autumn colour in the surrounding landscape, and significant drops in visitor numbers.
The one wildcard is wind. Patagonia is windy in any season, and the southern wind can suspend boat tours and affect walkway access when it reaches gale force. Build flexibility into your glacier days.
Getting there and getting around
El Calafate has its own international airport (FTE), Aeropuerto Internacional Comandante Armando Tola, with direct flights from Buenos Aires (roughly 3 hours), Bariloche, and Ushuaia. Most visitors fly; the overland journey from Buenos Aires takes well over 24 hours by bus.
Getting around El Calafate itself is easy on foot; it’s a small town. Taxis are available and cheap. For the glacier, most people book organised day tours from their accommodation. Renting a car gives you more timing flexibility for the glacier (you can arrive early and stay late) and is useful if you’re driving to El Chaltén.
Buses to El Chaltén (4 hours each way) and to Río Gallegos for connections into Chile operate from the bus terminal near the lake.
Frequently asked questions
How many days do you need in El Calafate? Two full days covers El Calafate well: one day for the Perito Moreno walkways and ice trekking (or a boat tour), and one day for a lake excursion or the town itself. Add two or three more days if you’re travelling to El Chaltén, which deserves its own overnight stay.
Is El Calafate or El Chaltén better? Different experiences. El Calafate is primarily about the glacier, a unique geological phenomenon you experience mostly by looking at it. El Chaltén is about hiking: physically active, mountain-trail-focused, requiring more fitness. Many people visit both; they’re four hours apart and complement each other well.
Why did Perito Moreno hold steady while other glaciers retreated? It’s partly explained by the geography: the glacier feeds from a high-altitude accumulation zone that continues to receive substantial snowfall, compensating for melting at the lower end. But glaciologists note that the local dynamics are complex and the glacier has shown stability over a period when most others in the region are clearly retreating. It’s not immune to climate change: monitoring suggests longer-term vulnerability, but it behaves differently from its neighbours.
What is the difference between Minitrekking and Big Ice? Minitrekking is a guided walk of about an hour on the lower glacier in crampons, accessible for most reasonably fit people. Big Ice is a four-hour guided walk on the upper glacier, covering more terrain and requiring more fitness and confidence on uneven ice. Both are booked in advance and conducted in small groups.
What is the ice rupture at Perito Moreno? When the glacier advances far enough to contact the Magallanes Peninsula, it blocks part of Lago Argentino. Water pressure builds behind the ice dam until the glacier ruptures, sending enormous blocks of ice into the lake over hours or days. The rupture happens unpredictably, roughly every one to several years.
Can you visit the glacier without a tour? Yes. You can drive yourself (or hire a remise) to the park, pay the entry fee at the gate, and walk the viewing platforms independently. The ice trekking options require booking with the specific companies that hold permits, but the walkways are self-guided.
Is El Calafate worth visiting without ice trekking? Yes. The walkways give you extended, close views of the glacier face; many people find this more moving than the ice trekking because it’s extended and unhurried. Ice trekking adds the physical experience of being on the glacier, which is genuinely different. Both are worthwhile; neither is mandatory for a meaningful visit.
How do you get from El Calafate to Torres del Paine? Several companies run overland bus services from El Calafate to Puerto Natales (in Chile), the gateway town for Torres del Paine National Park. The journey takes around five hours and crosses the Argentine-Chilean border. From Puerto Natales, the main park entrance (Laguna Amarga) is about 110 kilometres further. Some travellers cross by private transfer instead of bus for convenience.
New guides, every week.
A short weekly email with the latest destination guides. No spam, unsubscribe anytime.