W Trek Patagonia: Know Before You Go

The W trek is a four-day walk through three valleys on the southern side of the Paine massif, inside Torres del Paine National Park in Chilean Patagonia. The route traces a rough letter W across the map, which is where the name came from. The park's own figure for it is three to five days.

Published figures for the W vary widely, because most of them describe one person's particular week rather than a measured route. Elevation totals in circulation range from about 8,000 to 13,000 feet. A range that wide is not something you can plan against.

This page carries the figures our own trips are built on, day by day, and the park rules that decide whether you get onto the trail at all.

The map

• Length: 67 km (42 miles), summed from our published stages

• Elevation gain: about 2,570 m (8,430 ft), against 2,650 m (8,690 ft) of descent

• Duration: 3 to 5 days of walking, 7 days door to door on our own trip

• Best time: September to April

• Difficulty: moderate, 3 of 5 for fitness and 3 of 5 for technical ground

• Route: Torre Central to Grey, point to point, walked east to west

• Hardest day: the towers, 20 km (12 miles) with 1,150 m (3,770 ft) of climb

• Booking: every night reserved in advance, with no daily cap on the route

The duration is the park's own figure and the distances are the published stages of our itinerary, rather than a guidebook estimate. The row to act on first is the booking, because the beds run out long before the season does.

The park sits in the Magallanes region at the southern end of Chile, close to the Argentine border and a long way from anywhere else, in the stretch of Patagonia shared between Chile and Argentina. Punta Arenas is the airport and Puerto Natales is the last town before the park gate.

Three valleys run north off the shore of Lake Nordenskjold, and the W is those three valleys joined by the trail that runs along the water between them. The eastern arm climbs the Ascencio valley to the towers themselves, the middle arm goes up the French Valley, and the western arm ends at the face of Grey Glacier. The three arms and the shore between them draw a W.

The shape matters for a reason nobody mentions until you are standing at a bus stop. This is a point-to-point route, not a loop, so you finish a long way from where you began and the transport at each end is a separate problem to solve.

Names vary more than they should. Some operators sell it as the W circuit Torres del Paine, which is a contradiction given it does not close on itself, and park signage uses sector names rather than a letter. A signpost will point to Paine Grande, never to the W.

These are the published stages from our own W trek itinerary, one line per walking day, with the ascent and the descent for each of them rather than a single total lifted from a guidebook:

That totals 67 km with about 2,570 m of ascent and 2,650 m of descent across four days. Every night on the route is spent near lake level, which is why those two totals sit so close together and why there is no single high pass to cross. Most of the week is gentler than people expect.

Want to walk this itinerary? Our tour covers it in full:

How Hard the W Trek Really Is

We rate the trip 3 of 5 for fitness and 3 of 5 for technical ground, which puts it a full step below the O circuit on fitness. Nothing on the W needs a rope, a helmet or any scrambling, and in season the trail is boots and poles from end to end.

The difficulty is concentrated almost entirely in one day. The climb to the towers viewpoint is 1,150 m of ascent and an identical descent inside a single day, and the last stretch is a boulder field that people consistently underestimate because it looks close. The park puts the towers round trip at eight hours, which is the honest measure of it.

Descent is what ends most weeks early here, not climbing. You lose 2,650 m over four days and almost half of that comes down in one afternoon off the towers, so poles matter more on this route than fitness does. If you are training for it, train the downhills.

Then there is the wind, which is the variable no training plan covers. It is strongest in December and January, it arrives across open lake shore with nothing to break it, and it turns an easy 12 km day into a long one. Wind, not gradient, is what makes a short day feel long.

Which Direction to Walk

The W can be walked either way, and almost every guide presents this as a matter of taste. It is not. Direction decides where the 1,150 m day lands in your week, and that is the single biggest choice you make about how the trek feels.

Our own W trek itinerary runs east to west, starting at Torre Central and finishing at Grey. The hardest day comes first, on fresh legs, and each following day is shorter and flatter than the one before it.

Walking west to east reverses that, so you build into the towers day with three days of trail behind you and finish on the route's highest point. Plenty of people prefer it, and the argument for it is real: you reach the towers already used to the daily distances. The argument against is that you reach them tired.

There is a practical consequence too. Finishing in the west means leaving by water rather than by road, and our trip includes a one-way boat on Lake Grey to get out. A boat exit is a fixed departure time, not a trail you can walk slowly.

The terrain is not what stops people walking the W. The booking is. The park is explicit that anyone doing the W or the Macizo Paine circuit must reserve their accommodation in advance, and there is no walk-up option and no wild camping fallback.

The awkward part is that the beds are not sold in one place. Two concessionaires split the route between them, Las Torres Patagonia and Vertice Patagonia, and both have to match up on the booked dates or the chain breaks on one missing night. Park entry is then a separate transaction again, bought online before you arrive.

There is one exemption worth knowing, because it is the source of most of the confusion online. The reservation rule does not apply to people entering for the day, such as the Base Torres walk, nor to the campsites on the roadside. A day walk to the towers needs no reservation at all, which is why you will read that the park is open access.

One more thing to clear up. The CONAF limit of a maximum of 100 people a day on the O circuit does not apply to the W trek. The latter's main constraint is bed availability, which bites earlier in the year than any cap would.

Our W trek trip exists largely to take it off your hands, because the beds and the park ticket are bought before you fly.

The W trek refugios are the reason this route suits people who would not consider a remote trek. These are staffed buildings with bunk rooms, hot showers, a dining room and a kitchen, not shelters. You carry a day pack, not a full expedition load.

Most refuges also run a campsite alongside, and the price ladder runs from your own tent on a platform, through a pre-pitched tent with a mattress, to a bed indoors with meals included. The catch is that the cheaper tiers go just as fast as the beds. Camping does not rescue a late booking.

Our trip uses four of them in sequence: Torre Central below the towers, Los Cuernos on the Nordenskjold shore, Paine Grande on Lake Pehoe, and Camp Grey at the western end. Full board matters more than comfort here, because carrying four days of food would change the walking entirely.

The O trek vs W trek question is worth ten minutes before you book, because the two trips are less similar than the map suggests. The O is the complete lap of the massif and its southern half is this exact route, walked as one line. It adds a remote northern section the W trek never touches.

The numbers split cleanly. The W is four walking days, 67 km and about 2,570 m of ascent. The O circuit is seven walking days, 135 km and roughly 5,700 m, with a 1,200 m pass in the middle of it. The O trek is not a harder W trek, it is the W with three remote days bolted on the front.

Take the W trek if you have a week rather than a fortnight, if this is a first multi-day trek, or if a cooked dinner at the end of every stage is part of why you are going. Season decides it for a lot of people anyway, because the W trek's walkable window is months longer than the O trek's.

The season runs September to April. March is the single best month to aim for — the summer wind has dropped, the beech forests turn, and the refuges are open but no longer full.

• September–October

  Spring, and the quietest, driest weeks of the season. Nights are cold, snow still lies on the higher ground, and the days are short at the start.

• November–December

  The windiest stretch of the year, and the point where daylight runs past ten in the evening. These weeks book out furthest ahead.

• January–February

  High summer. The warmest air of the year at highs still under 16 °C, long light, and the busiest the trail gets.

• March–April

  Autumn. The wind eases, the southern beech turns red and copper, and the route empties out. These are also the two wettest months in the park.

Our own trips run across that whole window. Refuge opening dates are set by the concessionaires rather than the calendar, so a September or April departure is worth confirming before you book flights.

Outside it, the park does not simply close. The Base Torres walk stays open through winter with real conditions attached: the park sets a 09:00 entry deadline and a 15:00 exit, requires an accredited guide, and expects micro-crampons and poles on trails carrying 20 to 30 cm of snow or more. In winter the towers walk is guided or it does not happen.

Registration is compulsory. You must register on arrival at every ranger station you pass. It is the mechanism that tells anyone to look for you, not a formality.

Buy park entry before you fly. Tickets come from CONAF's ticket platform online rather than at the gate. Carry the confirmation on paper as well as on your phone.

There is no signal on the interior trails. No mobile and no internet, for the whole route. A printed W trek map earns its place in the lid of the pack, and a downloaded GPS track earns its place on the phone.

Stay on the marked path. The park states plainly that almost every fatal accident happens off the authorized trails, and that leaving them is dangerous rather than adventurous. The rest of the mountain safety basics apply here as they do anywhere.

Do not cross a river above knee height. Meltwater rises through the afternoon, so a crossing that looked fine in the morning is a different proposition at four o'clock.

Water, money and language. Stream water on the route is generally drinkable, so weight goes into layers rather than liters. Spanish is the working language of the park and its staff, English is widely spoken in Puerto Natales, and cash is worth carrying for the refuges, because there is no signal on the interior trails to fall back on.

Our version is self-guided and hut-to-hut, with the beds reserved, the park entry bought and the route loaded onto your phone before you arrive. The full trip list carries current dates. The figures below are our published ones, not estimates.

Want to Skip the Planning?

The W is not a hard walk. It is a hard booking. Two concessionaires split the beds along the route, both have to clear the same dates or the chain breaks on one missing night, and park entry is a separate transaction on top of that. This is where most people who give up on the W give up — at a booking screen, months before they would have set foot on the trail.

Our version takes that off your schedule:

• every night along the route held for your dates,

• park entry bought,

• the four stages above loaded onto your phone with maps and day notes, and

• a number you can call while you are out there.

It stays self-guided, so you still walk it at your own pace with nobody to keep up with. Looking for a different Patagonian hiking gem? Check our full trip list.

Two nights sit in a hotel in Puerto Natales at either end, and the four walking nights are spent in the refuges on the route. What people book as the Torres del Paine W trek is really this: four days of walking wrapped in two days of logistics, and the logistics are the part worth handing over.