A million square kilometres of wind, granite and ice split between Chile and Argentina, with a four-month season and a booking window that opens the year before.
What it is
The southern third of South America below roughly the 39th parallel, split down the Andes between Chile and Argentina. On the Chilean side: fjords, temperate rainforest, glaciers and a coastline shattered into islands. On the Argentine side: the dry steppe, enormous skies, sheep, and the eastern faces of the same mountains.
It is emptier than almost anywhere else that is easy to reach — about two people per square kilometre — and the weather is the defining fact. The wind comes off the Pacific and across the ice fields and blows constantly through the summer, regularly at 100km/h. Four seasons in a day is not a saying here, it is a forecast.
The season, which is short and absolute
November to March. That is it.
December to February is high summer: long days — light until eleven at night — everything open, and full. This is when the trekking is possible and when the accommodation costs the most.
November and March are the shoulders: fewer people, more changeable weather, and some services not yet running or already stopped. March has autumn colour in the lenga forests and is many people’s favourite.
April to October is winter. Most of the trekking infrastructure closes, the roads in the far south become difficult, and the Carretera Austral is a serious undertaking. Ushuaia keeps going as a ski town and as the Antarctic gateway.
The four things people come for
Torres del Paine, Chile. The granite towers, and the W trek (four to five days) or the O circuit (seven to nine). Both require booked accommodation — refugio or campsite — for every night, and the park does not let you start without proof. Bookings open around a year ahead across two or three separate operators, which is as annoying as it sounds.
El Chaltén, Argentina. The Fitz Roy massif, and the best free trekking in Patagonia: day walks to Laguna de los Tres and Laguna Torre start from the village, need no permit and no booking, and are the equal of anything in the park across the border.
Perito Moreno glacier, Argentina. One of very few glaciers on earth that is not retreating. Boardwalks put you a few hundred metres from a sixty-metre ice wall that calves while you watch.
The Carretera Austral, Chile. 1,240km of mostly gravel road through northern Patagonian rainforest, with ferries in the gaps. A driving or cycling trip of one to three weeks and the least-visited part of the region.
Crossing between the two countries
You will cross at least once and probably twice. The main crossings — Cerro Castillo for Torres del Paine to El Calafate, and Paso Roballos or Chile Chico further north — are routine but slow, and no fresh food, meat, dairy, fruit or seeds may cross in either direction. Agricultural inspection is thorough and fines are real. Eat it or bin it before the border.
Buses connect the main towns on both sides. Hiring a car in one country and driving it into the other requires specific paperwork arranged in advance with the rental company and costs extra.
Getting there
Punta Arenas and El Calafate are the two main airports for the far south, both usually via Santiago or Buenos Aires. Puerto Montt and Balmaceda serve the Carretera Austral.
Distances are enormous and bus journeys of ten to fourteen hours are normal. Internal flights in Argentina are subsidised and cheap; in Chile less so.
What to bring
Wind is the thing. A proper windproof shell matters more than a warm coat, and a tent that has been tested in wind is not optional if you are camping — Patagonian campsites are littered with the remains of ones that were not.
Layers, because the temperature swing between sun and shade is severe. Sun protection, because the ozone layer over the far south is genuinely thinner and burns happen fast.
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