An Expert's Guide To Chilean Patagonia's Trekking Routes

With its access to the tail end of the Andes Mountains, it’s no wonder that Chilean Patagonia has become a paradise for trekkers. Landscapes are wild and enthralling, with the contrast between towering mountains and weather-beaten forests and grasslands nothing less than magical. Exploring this preternatural beauty is best done slowly and contemplatively, and tackling one of the region’s world-famous hikes is an incomparable way to do this.

The best Patagonia treks lie on the Chilean side of the region and range from moderate hikes with comfortable refuges en route suitable for inexperienced walkers, to challenging, far-flung backcountry affairs where nights beneath canvas are the only option. Contrary to popular belief, these trails all stay beneath 4,000 feet (1,200m), meaning altitude isn’t a consideration.

Most of the treks have strict windows during which they’re open due to weather conditions; Patagonia is famous for its changeable and sometimes severe weather, after all. Some routes pair well together, creating multi-destination trekking vacations that showcase the different – but always spectacular – characteristics of this singular region. And, while it’s possible to venture out on these trails alone, Patagonia hiking guides can help organize the trip, as well as provide fascinating local knowledge on the ground.

Intrigued? Here are the four best Chilean Patagonia trekking routes.

Torres del Paine National Park

With its backdrop of purple-hued granite mountains, shimmering glaciers, and vast lakes, Torres del Paine National Park has quickly become emblematic of Chilean Patagonia’s hiking riches. While day hiking is plentiful here, the more adventurous are drawn to its two high-profile multi-day routes, the W and the O Circuit.

Torres del Paine is easy to reach from the Chilean capital, with flights taking just three hours to get to the nearby town of Puerto Natales, from where it’s a 1.5-hour drive into the park.

The W

Best for: Hikers looking for their first multi-day trekking experience

Difficulty level: Moderate

Length: Four or five days; 50 miles (80km)

Best time to go: Late October-early April

Standout features: The Torres (towers), French Valley, Grey Glacier, and Lake Nordenskjöld

The W is considered one of the world’s best hikes thanks to its dramatic scenery and accessibility for those who’ve never tackled a multi-day trek before. A five-day trail that takes hikers in a ‘w’ formation around the park’s central Paine Massif mountains, the W ventures to the skirts of the huge Grey Glacier, tramps alongside mountain lakes such as Lake Nordenskjöld and into the untouched French Valley, and culminates in the challenging – but oh-so-worthwhile – clamber up to the lake beneath Las Torres, the three granite towers after which the park is named.

Accommodations en route appeal to all: opt for camping or stays in cozy refugios, or choose the option of a luxury tour where you return to a nearby hotel for a sound sleep each night. Due to its popularity, visitor numbers can reach hundreds per day, so this isn’t a quiet trail; visit during shoulder season (October-November, March-April) for a more contemplative experience.

Whenever you plan to visit, advance bookings are necessary: expect to make reservations with a minimum of six months’ anticipation for peak season (December to February), and four for shoulder season.

The O Circuit

Best for: Experienced hikers with some multi-day trekking experience

Difficulty level: Challenging

Length: Eight or nine days; 82 miles (132km)

Best time to go: Late November-early April

Standout features: Quiet trails, Paso John Gardner, the remote northern side of the Paine Massif, and the W

While the W makes for a spectacular introduction to Chilean Patagonia’s wild scenery, trekkers with more experience and a greater sense of adventure should consider the O Circuit instead. The route adds four or five days to the W, visiting the standout parts of the shorter trail, while adding the more remote, untouched northern side of the Paine Massif.

Capped at just 70 trekkers per day, the trail is a more tranquil affair, circumnavigating the mountains as it passes alongside glacier-strewn mountains and upwards to the John Gardener Pass. The latter is a challenging climb up to 3,940 feet (1,200m); views from the top across the Southern Patagonian Ice Field are a worthwhile reward.

Like the W, overnight stops are in either comfortable hut-style accommodation or pre-pitched camping; hotel stays aren’t possible until you reach the W. Much like the shorter route, reservations go quickly, so bookings must be made well in advance.

The Carretera Austral

Northern Chilean Patagonia takes a back seat in most travelers’ vacation plans, but this destination is the region’s best-kept secret. Spanning 770 miles (1,240km) from Puerto Montt down to Villa O’Higgins, the Carretera Austral or Ruta 7 is a remote road uniting isolated communities and some of Patagonia’s finest scenery. Balmaceda, the airport halfway down Ruta 7, has direct air connections to Santiago and Punta Arenas.

With six national parks offering hiking trails in the region, it’s a world-class destination for day trekking, while multi-day expeditions allow even deeper immersion.

Cerro Castillo Traverse

Best for: Hikers looking for their first multi-day trekking experience

Difficulty level: Moderate to challenging

Length: Four days; 31 miles (53km)

Best time to go: Late November-March

Standout features: Quiet trails, Lake Cerro Castillo and Cerro Castillo mountain, wildlife

Within the heart of the Aysen region of Patagonia lies one of Chile’s standout multi-day treks. Named for the castle-like mountain at its heart, Cerro Castillo National Park is a playground of old-growth southern beech forests, crumbling mountains, and gleaming glacial lakes – all without the crowds that flock to Torres del Paine National Park.

This route has its challenges; the ascent up to Lake Cerro Castillo, which sits beneath the mountain of the same name, is exposed to high winds, and the terrain is loose scree that makes hiking difficult. However, the effort pays off in spades, with the trail taking the intrepid through the stunningly varied scenery found in northern Chilean Patagonia.

Facilities are basic, with designated campgrounds without amenities requiring trekkers to be self-sufficient (although Patagonia walking tours can leave hikers carrying just a small backpack). But the rewards are significant. While visitor numbers peak in high summer, reservations are not required for the campgrounds.

The far south

An island south of mainland South America, Isla Navarino and the community of the 3,000-person-strong town of Puerto Williams remain emphatically off-the-beaten trail. This remote destination is framed by the jagged peaks of the Dientes de Navarino and the seemingly endless waters of the Antarctic Ocean in the south.

It receives a mere fraction of visitors compared with the more popular places further north. This is no reflection on its appeal, however, but more the challenges of arriving. Limited flights between Punta Arenas and Puerto Williams, or a 32-hour passenger ferry from mainland Chile, are the only two means of getting to the island. But those who make the effort to do so will find some of Patagonia’s wildest scenery.

Dientes de Navarino

Best for: Experienced hikers seeking Patagonia at its most untamed

Difficulty level: Strenuous

Length: Five days; 27 miles (43km)

Best time to go: December-February

Standout features: Absolute isolation, Dientes de Navarino mountains, and pristine backcountry

For those who’ve already visited Torres del Paine National Park, the scenery of the Dientes de Navarino trek will likely come as a surprise. This is still Chilean Patagonia, but it barely feels like the same country. The scenery is untamed and fierce, battered by the unyielding fury of the icy Antarctic storms that blow into the mountains here. Jagged shards of rock and glaciated peaks tower above deep U-shaped glaciers sequestering mountain lagoons and subantarctic forests.

This trek – which is officially the southernmost on the planet – is a serious challenge. Peat bog and boulder fields can make progress exceptionally slow, while the weather can change in an instant, bringing snowstorms even in the height of summer that obscure the already poorly-marked trail.

But there’s nothing quite like the experience of trekking at the very edges of the Earth, practically alone save for a few other adventurers. This is Patagonia at her most beautiful – and extreme.

Reservations are not required for the “campgrounds” (which are just flat areas to pitch up), but the trekking season is short due to the variability of the weather. An expedition trekking tour is the safest means of completing this hike.

Seasonality tips

Patagonia has clearly demarcated seasons, which follow the opposite months of the northern hemisphere and which determine the trekking season and when trails open across the region.

Spring begins around September, although the trekking season starts later: from late October to late November, depending on the location. During these months, snow melts and temperatures slowly increase to the low 50s, although it’s common for them to drop below freezing at night. A four-season sleeping bag is recommended if camping during these months.

Daylight hours increase gradually to a maximum of 18 hours by the summer solstice at the end of December. Most visitors arrive in Patagonia between now and March, as temperatures reach the mid-60s and remain above freezing at night – making camping comfortable. This marks the start of summer and the peak hiking season, when trekkers can expect the most sunshine and the least rainfall, although strong winds can make conditions on the trail challenging, particularly at exposed passes.

As summer slips into fall in March, the wind drops and rain starts to fall more frequently, adding atmosphere to trails but sometimes obscuring iconic landmarks. By mid-April, all but the W is closed for the winter, which arrives in June, bringing daytime temperatures below freezing and snow that blankets national parks and closes roads and other infrastructure.

For hikers heading to Torres del Paine, the shoulder months of November (spring) or March and April (fall) offer a great balance of lower visitor numbers and comfortable trekking conditions. For the Carretera Austral, visitor numbers are lower, even in peak season; avoid late December and January when crowds are greatest. In the Far South, hiking is recommended during the short window of summer – mid-December through early-March – while the trail is closed between May and October.

Regardless of the season, bring layers and rain gear in preparation for Patagonia’s famously changeable weather.

Combining routes

Expedition trekking in Patagonia is far more than a single trail. For trekkers with two weeks or more, some of the routes can be linked together as part of a wider trip to Patagonia.

The most obvious pairing is opting for the O Circuit, which is an extension of the W. Budget an extra four or five days, depending on hiking speed.

Further north, Cerro Castillo pairs perfectly with a Carretera Austral road trip. Finish the four-day circuit, and then drive south to Puerto Rio Tranquilo for the rainbow-hued marble caves or to Patagonia National Park for dazzling day hikes. For longer trips, consider combining the W trek in Torres del Paine with the Carretera Austral; a direct flight between Punta Arenas and Balmaceda makes this easy to organize.

For the truly committed, end a trip to Torres del Paine National Park with the Dientes de Navarino. Fly from Punta Arenas to Puerto Williams to spend five days on these wild trails, before a couple of days kicking back at Errante Ecolodge, the island’s best hotel.

Expedition trekking in Patagonia is surprisingly accessible and pairs wonderfully with private guided overland excursions and expedition cruise itineraries, allowing you to explore the wilderness from a place of more comfort. Our destination experts can craft an unforgettable Patagonian itinerary, balancing multi-day trekking adventures with the time and space to absorb the magic of this breathtaking region.