O Circuit Torres del Paine: The Complete Guide

O Circuit Torres del Paine: The Complete Guide

The O Circuit — also called the Paine O Trek — is the ultimate Torres del Paine trek: a full loop around the Cordillera del Paine that reveals the wildest, most remote corners of the park, far from the crowds of the W. Covering roughly 126–127 km over 7 to 9 days (commonly 8), it combines the entire W route with the remote "back side" of the massif. This guide, written by a Puerto Natales operator, covers how to plan it.

What makes the O Circuit special

The O includes everything the W offers — the base of the Towers, the French Valley, the Grey Glacier — plus the solitary northern sectors that only O trekkers ever see. The crown jewel is the ascent to the John Gardner Pass, the highest and most demanding point of the route, where the vast Southern Patagonian Ice Field suddenly opens up before you — one of the most breathtaking views in all of Patagonia.

Direction and sectors

The O Circuit can only be walked counter-clockwise (the back section is one-way for safety). You'll pass through these sectors in order: Serón → Dickson → Los Perros → John Gardner Pass → Grey → Paine Grande → Francés → Central → base of the Towers.

Sample 8-day itinerary

• Day 1: Transfer from Puerto Natales into the park; hike to Serón sector.
• Day 2: Serón → Dickson, alongside the Paine River and Dickson Lake.
• Day 3: Dickson → Los Perros, past the hanging Perros Glacier.
• Day 4: The big day — Los Perros → John Gardner Pass → Grey, with the ice field reveal.
• Day 5: Grey → Paine Grande (now on the classic W).
• Day 6: Paine Grande → French Valley → Francés/Cuernos.
• Day 7: On to the Central sector.
• Day 8: Sunrise climb to the base of the Towers, then transfer back to Puerto Natales.

O Circuit vs W Trek

Choose the O if you're a fit, experienced hiker with 7+ days who wants solitude and the ice-field pass. Choose the W Trek if it's your first time, you have less time, or you prefer busier, well-served trails with the park's highlights. Both start and end from Puerto Natales.

Reservations and permits

The O requires careful planning: you must reserve every night in the right sector and in the right order, across two operators — Las Torres Patagonia and Vértice — plus your CONAF park entrance. The remote back-side refuges (Serón, Dickson, Los Perros) have limited capacity and sell out early; bookings typically open around April for the coming season. Getting the sequence right is the hardest part of the O, which is why many trekkers go all-inclusive.

Best time to go

The O Circuit's back section opens later than the W — roughly November to March — because of snow on the John Gardner Pass. Peak season is December–February. Always be ready for strong wind, rain and rapid weather changes, especially on the pass.

Guided or self-guided?

Because of the complex reservations, remote terrain and the demanding pass, the O rewards good support. An all-inclusive O covers park entrance, round-trip transfers, full-board lodging inside the park and a local guide — so you can focus on the trail. Guide and luggage porter can be added.

Ready for Patagonia at its wildest? See our O Circuit Patagonia Trek, compare it with the W Trek, or browse all our Torres del Paine treks and tours. New to the region? Start with our Puerto Natales guide. Book your O Circuit with Kali Travels.