Torres del Paine: W or O — which to choose

In short: what's the difference

Torres del Paine is a national park in southern Chile, 250 km north of Puerto Natales. Inside the park is the Paine massif — three granite towers, glaciers, turquoise lakes, and beech forests. Two foot routes:

• W trek — 80 km, 4–5 days, runs along the south (front) side of the massif. Goes into the three "arms" of the W letter: French Valley, the Torres base, and Grey Glacier.
• O circuit (Macizo Paine, the full loop) — 110–130 km, 8–10 days. Includes the entire W plus the north (back) side of the massif with the John Gardner pass (1200 m).

If you're heading to Patagonia for the first time and don't have 10 days just for the park — pick the W. If you have experience with self-supported treks and want to see the massif from both sides — take the O.

W trek: what's inside

The classic route 80% of trekkers in the park follow. You can go west to east (start at Paine Grande, finish at Las Torres) or the other way. Both directions work; east-west is a bit more popular because it saves the towers for the finale.

Distance: 71–80 km depending on side-trip options. Days: 4 (fast, no buffer) or 5 (comfortable). Elevation gain: ~3000–3500 m total. Difficulty: moderate. The trail is marked, the climbs are gradual, no dangerous sections. Camps along the way: Paine Grande, Italiano (or Francés), Cuernos/Los Cuernos, Chileno, Central/Torres. Key points: mirador Las Torres (sunrise at the three towers), French Valley with a view of Cuernos, Grey Glacier with or without an ice cruise.

Who the W is for

• A first long trek in Patagonia.
• You have basic fitness (you can walk 6–8 hours with an 8–12 kg pack).
• You want the "postcard" views without big sacrifices.
• Budget from $400 to $1000 per person for the route.

O circuit: what gets added to the W

The O is the W plus the back side of the massif. It only goes counterclockwise (by park rules): start at Central, through Seron, Dickson, Los Perros, John Gardner pass, Grey, and then the classic W to the towers.

Distance: 110–130 km. Days: 8–10 days. Elevation gain: ~5000–5500 m. Difficulty: high. The John Gardner pass (1200 m) — snow often lies there even in January, the wind can be strong, visibility can drop to 50 m. The descent from the pass to Grey Glacier is steep, in places along ropes and ladders. Camps: Seron, Dickson, Los Perros, Paso, then like on the W.

Who the O is for

• You have experience with multi-day self-supported treks (Huta-Long, the Alps, Kamchatka).
• You're ready to carry 12–16 kg (if you're camping, not refugios).
• Bad weather doesn't scare you: rain, wind, snow on the pass.
• Budget from $700 to $1500 per person.

Difficulty by day and by hard sections

W trek by difficulty:

• The hardest day — the climb to mirador Las Torres: 18–22 km round trip, the last kilometer on a 30–40% gradient moraine. 8–10 hours.
• French Valley up to mirador Británico — 22 km round trip, no major climbs but long.
• Other transfers are 12–18 km on relatively flat trail.

O circuit — extra difficulties:

• Los Perros → Paso (John Gardner pass) — 12 km, 700 m climb, then a sharp 800 m drop to Grey. There's often snow and 60–80 km/h wind on the pass. 8–11 hours. This is the hardest day of any classic trek in Chilean Patagonia.
• Between Dickson and Los Perros — boggy sections, boardwalks, log crossings.

How much it costs

Prices for 2026 in USD per person. There are two operators in the park: Vértice (the western half of the W and the northern part of the O) and Las Torres / Fantástico Sur (the eastern half of the W and the climbs to the towers). You book with each separately.

W trek

Plus separately: park entry ~$50, transfer from Puerto Natales ~$30 round trip, catamaran across Lake Pehoé ~$40.

O circuit

You can't do the O entirely in refugios — on the Seron, Dickson, Los Perros, and Paso sections there are only tent camps on platforms.

Booking: the main bottleneck

This matters more than the choice between W or O.

• Booking opens in July–September of the previous season. For December–February 2026 — book in July–October 2025.
• By November 2025 most January–February dates are already closed.
• You book separately with two operators: Vértice (vertice.travel) and Fantástico Sur (lastorres.com). Without confirmed bookings for every night, rangers won't let you on the trail.
• The Paso pass on the O has an additional daily headcount limit — it closes even earlier.

If you're planning the trip 2–3 months before the start — realistically only the W in shoulder season (November, April) or wild camping outside the park with day hikes is on the table.

Best time

• December–February — the most stable, long day (sunset at 22:30), temperature +5...+18 °C. Crowds and packed refugios.
• November and March — colder (-2...+12 °C), fewer people, higher chance of wind and snow on the pass. The best view-to-crowd ratio.
• April — golden autumn, beech forests yellow and red. Some refugios are already closed.
• May–September — winter season, the classic O is closed, the W is possible only with a guide and winter gear.

Logistics from Ushuaia

Torres del Paine is in Chile, and Ushuaia is in Argentina. There's no direct connection. The standard route:

1. Ushuaia → El Calafate (Argentina). 1 hr 20 min by air, $120–180, or 18 hr by bus via Río Gallegos.
2. El Calafate → Puerto Natales (Chile). 5–6 hr by bus, $30–45, border crossing at Cerro Castillo.
3. Puerto Natales → the park. 2 hr by bus, $15 one way. Start at Laguna Amarga (for the O and the east of the W) or at Pudeto via the Pehoé catamaran (for the west of the W).

You can't reach the park from Ushuaia in one day. Plan for at least 1 night in El Calafate and 1 night in Puerto Natales before the trek starts.

How Torres del Paine fits into a route from Ushuaia

If you have 14–18 days for Patagonia, the classic layout is:

• Ushuaia — 3–4 days: Beagle Channel, Tierra del Fuego National Park, the Laguna Esmeralda trek.
• El Chaltén — 3–4 days: Fitz Roy, Laguna de los Tres, Cerro Torre.
• El Calafate — 1–2 days: Perito Moreno glacier.
• Torres del Paine — 5–9 days: W or O plus a travel day on each side.

We (Magellania) don't guide in Chile — the park is across the border. But we cover the entire Argentine side of the route: Ushuaia, El Chaltén, El Calafate, transfers to Puerto Natales. And we help plan the trip so the TdP dates line up with what you're doing on the Argentine side.

What to bring

• Rain jacket and pants (a membrane shell, not a poncho — wind).
• Warm layer (fleece + light down jacket).
• Trekking boots with ankle support.
• Poles — especially for the descent off the pass on the O.
• Gas stove and canister (canister bought in Puerto Natales, can't fly with it).
• Sleeping bag rated to -5 °C for camping, or a liner for refugios.
• Headlamp, category 3–4 sunglasses, SPF 50 sunscreen.

Summary: which one to choose

• Take the W if this is your first long trek, you have 5–6 days for the park, your budget is up to $1000, and you want to sleep in refugios.
• Take the O if you have 10+ days, you have self-supported experience, you're ready for the pass with possible snow, and you want to see the massif from the side 15% of park visitors see.
• Take neither if you have less than 4 full days in the park, or you're booking a month before the start in high season. Better to do a one-day trek to the towers from Puerto Natales and spend the spare days in El Chaltén.