Patagonia’s W & O Treks: What’s the Difference?

In the far south of Patagonia, Torres del Paine National Park delivers one of the world’s most dramatic landscapes. Here, two iconic trekking routes lead you deep into Patagonia - each one named for the shape it makes on the map.

The W Trek follows three spectacular valleys in and out, tracing a zigzag that resembles the letter ‘W’.

The O Circuit loops around the entire Paine Massif, forming a full ‘O’ shape as it circles back to its starting point.

But these aren’t just lines on a trail map. They represent two very different adventures.

W is for Welcome, Wonder and Walkability

The W Trek is Patagonia’s most accessible and popular route. Over 5 supported days, you’ll follow well-marked trails past glaciers, valleys and granite spires - without having to carry a heavy pack or rough it in a tent.

W is for...

• Wonders like Grey Glacier, French Valley and the towers themselves
• Well-supported travel - with mountain lodges, luggage transfers and local guides
• Walkable days, averaging 6–8 hours at a moderate pace
• Warm beds and hot meals, no camping required

With added time in Los Glaciares National Park in Argentina, this adventure offers the perfect balance of big scenery and creature comforts.

Trip Grading: Moderate (Grade 5)
Trekking Duration: 5 days (plus travel days)

O is for Odyssey, Over the Pass and Off the Map

The O Trek, or full Torres del Paine Circuit, traces a complete loop - hence the ‘O’. It combines sections of the W with remote trails around the northern side of the massif, giving trekkers a more immersive and physically demanding experience.

You’ll camp in national park sites, climb over the John Garner Pass, and discover parts of the park few visitors ever see.

O is for...

• Off-grid valleys and glacial basins far from the W crowds
• Over the pass - John Garner rewards the fit with vast Ice Cap views
• Outdoor nights, with provided gear and designated campsites
• Only for the prepared - it’s not technical, but it is tough

Trip Grading: Challenging (Grade 7)
Trekking Duration: 8 days

Which Patagonia Trek Is Right for You?

No Wrong Way - Just Different Letters, Different Journeys

The W Trek gives you the classic Torres del Paine experience - light on logistics, heavy on views.

The O Trek takes you further - into solitude, high passes, and a greater sense of achievement.

Whichever route you choose, you’ll walk with expert guides, thoughtful planning and a small footprint - just as it should be in Patagonia.

Explore Patagonia Your Way

• View trip: Fitz Roy & W Trek Adventure
• View trip: Torres del Paine Circuit - O Trek
• Browse all Patagonia treks and hikes