Perito Moreno at a glance
- Location
- Los Glaciares National Park, Santa Cruz, Argentina
- Base town
- El Calafate, about 80 km east
- Ice front
- Roughly 5 km wide, around 70 m above the lake
- Lake
- Lago Argentino, Canal de los Témpanos arm
- Main activities
- Boardwalks, boat safaris, mini-trekking
- Season
- Year-round; October to April is peak
- Current status
- In retreat, per 2025 research
What Is Perito Moreno Glacier?
A large outlet glacier of the Southern Patagonian Ice Field, ending in an ice front roughly five kilometres wide and about 70 metres above the surface of Lago Argentino. It sits in Los Glaciares National Park, about 80 kilometres west of El Calafate, and is unusually easy to see at close range.
Most glaciers of this size are reached by ship or aircraft. This one has a road, a car park and a multi-level boardwalk system, which is why it draws visitors who would never otherwise stand in front of calving ice.
The scale is hard to read at first. The ice front you are looking at is taller than most of the buildings you live among, and the cracking sound arrives before anything visible falls.
Is Perito Moreno Still an Advancing Glacier?
No, and this is the part of the standard description that has changed. For decades it was presented as one of the few stable or advancing glaciers in Patagonia. Research published in August 2025 found it in substantial and probably irreversible retreat, having lost close to two square kilometres of ice cover over the preceding seven years.
The study, in Communications Earth & Environment, documents thinning and a sustained loss of mass, and concluded the retreat is likely to continue 1. Contemporary reporting recorded the same shift, describing a glacier that had long been considered an exception to the regional pattern and is no longer behaving like one 2.
None of that makes it less worth seeing. It does mean you should be sceptical of brochures and older guidebooks still calling it advancing, and it changes how a guide will talk to you about the ice while you are standing there.
What Can You Actually Do at the Glacier?
Three things, and they stack well in a single day. Walk the tiered boardwalks for panoramic views of the northern and southern faces; take a small-boat nautical safari across the lake for the scale of the ice wall from water level; or put on crampons for a guided mini-trek or Big Ice walk on the glacier surface.
| Experience | What it involves | Practical notes |
|---|---|---|
| Boardwalks (pasarelas) | Tiered steel walkways giving panoramic views of the northern and southern faces from several elevations | No booking needed beyond park entry; allow two to three hours |
| Nautical safari | Small-boat cruise on Lago Argentino to view the ice wall and calving from a safe distance on the water | Roughly an hour on the water; runs most of the day in season |
| Mini-trek and Big Ice | Guided walk on the glacier surface in crampons among crevasses and meltwater channels | Age limits apply, Big Ice is the longer and harder option; book well ahead |
Excursions are weather-dependent and operate from El Calafate or the park pier.
The boardwalks are free-standing enough that a full visit does not require any excursion booking, which makes this the rare Patagonian highlight with a genuinely low-cost option.
Ice trekking has hard limits: minimum age, upper age limits on the longer Big Ice route, no rigid footwear exemptions, and cancellation for weather. Book it before you arrive, not on the day.
What Is the Rupture, and Will You See It?
The glacier periodically pushes against the Magallanes peninsula and dams one arm of Lago Argentino. Water builds behind the dam, tunnels through the ice and eventually collapses the resulting ice bridge. It is a genuine spectacle and it is unpredictable, occurring irregularly with years between events.
Treat it as luck rather than an itinerary item. What you can reasonably expect on any visit is calving: blocks of ice breaking off the front and dropping into the lake, most frequently in the warmer part of the afternoon.
How Do You Get There and How Long Do You Need?
Fly or drive to El Calafate, then travel about 80 kilometres west by road to the park entrance. A full day covers the boardwalks and one excursion comfortably. Most travellers combining Perito Moreno with a fjord cruise allow two to three nights in El Calafate.
El Calafate has the airport, the hotels and the restaurants, and it is a straightforward town to base in. Park entry is paid at the gate and prices change annually.
Coming from Chile, the road route crosses at Cerro Castillo and Cancha Carrera. That crossing and its timing are covered in combining land and sea in Patagonia.
Have You Been to Perito Moreno?
No. Neither of us has been to Perito Moreno, El Calafate or Los Glaciares National Park. We have not walked the boardwalks, taken the nautical safari, or done the ice trek. Saying so matters more than usual here, because this is a page where firsthand detail is easy to fake.
What we do know at first hand is glacier ice from the water in the polar regions, which is where our own time has been spent: two Drake Passage crossings, Antarctic Peninsula landings, and East Greenland. That is a useful frame for what calving ice sounds and behaves like, and it is not the same as having stood on this boardwalk.
See where we've been for the full list, and what a Patagonia expedition costs for the pricing behind the Argentine leg.
Perito Moreno questions
Is Perito Moreno glacier advancing or retreating?
Retreating. It was long described as one of Patagonia's few stable or advancing glaciers, but research published in August 2025 found substantial and likely irreversible retreat, with close to two square kilometres of ice cover lost over seven years.
How long do you need at Perito Moreno?
A full day from El Calafate covers the boardwalks and one excursion. Most travellers allow two to three nights in town so that a weather cancellation does not cost them the glacier.
Can you walk on Perito Moreno glacier?
Yes, on a guided excursion in crampons. The shorter mini-trek and the longer Big Ice route both have age limits and weather cancellations, so they should be booked before you travel.
How often does Perito Moreno calve?
Ice falls from the front regularly through the day, most often during warmer afternoon hours. The larger rupture of the ice dam across Lago Argentino is irregular and cannot be planned for.
Can you see Perito Moreno on a cruise?
No. It is reached overland from El Calafate in Argentina, so it is added as a land extension rather than seen from an expedition ship in the Chilean fjords.