Patagonia's summer — December through February — is the narrow window when the region's famously volatile weather is at its most manageable, trails and park infrastructure are fully open, and long daylight hours (as much as 17 hours near the solstice) stretch out a day's hiking considerably. The trade-off is that it's also peak season for crowds and prices across the region's most famous trekking hub.
Torres del Paine National Park, Chile
Torres del Paine is the centerpiece of Chilean Patagonia and one of the most photographed national parks in South America — granite spires (the torres, or towers, the park is named for), turquoise glacial lakes, and the Grey Glacier all sit within a relatively compact, well-marked network of trails. The W Trek, a 4–5 day route connecting the park's three main highlights (the base of the towers, the French Valley, and Grey Glacier), is the most popular multi-day route and can be done via a mix of refugio (hut) stays and camping. Day-trip options from the gateway town of Puerto Natales cover the base-of-the-towers hike or a boat trip to Grey Glacier for travelers without the time or gear for a multi-day trek.
El Calafate and Los Glaciares, Argentina
On the Argentine side of the border, El Calafate serves as the gateway to Los Glaciares National Park and the Perito Moreno Glacier — one of the few glaciers in the world that is still advancing rather than retreating, and one that regularly calves enormous chunks of ice into Lago Argentino in a way that's genuinely watchable from the viewing platforms. El Chaltén, a few hours north, is Argentina's trekking capital, built around views of the Fitz Roy massif and considerably less crowded than Torres del Paine despite similarly dramatic scenery.
Getting Around
Puerto Natales (Chile) and El Calafate (Argentina) are the two main gateway towns, roughly a 5-hour drive apart across the Chile-Argentina border, and most multi-destination itineraries combine both sides rather than picking just one. Flights connect Santiago to Puerto Natales and Buenos Aires to El Calafate; the border crossing itself requires planning around limited crossing points and operating hours.
What to Pack
Patagonia's defining characteristic is wind, not cold — sustained gusts of 50+ mph are routine in summer, particularly in the afternoon, and they shape everything about how to dress and hike here. A genuinely windproof, waterproof outer shell is the single most important item, worn over an insulating mid-layer (fleece or light puffy) and a moisture-wicking base layer, since temperatures can swing from a warm, sunny morning to a cold, driving-rain afternoon within hours. Sturdy, broken-in hiking boots are essential for the uneven, often muddy W Trek terrain; trekking poles help considerably on the trek's steeper, windier sections. A hat that won't blow off (a secured sun hat or simply a beanie), polarized sunglasses, and strong sunscreen matter even on overcast days, since the ozone layer thins significantly over this part of the Southern Hemisphere in summer.
Booking Timing
Refugios and campsites inside Torres del Paine for the December–February peak routinely sell out 4–6 months ahead — this is the one piece of Patagonia planning that genuinely cannot be left to a few weeks before departure if a multi-day trek is the goal. Day-trip and lodge-based itineraries have more last-minute flexibility.
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