Torres del Paine O Circuit Trail

Quick facts for planning the O Circuit in Torres del Paine NP.

Time to Hike: 7-9 days covering roughly 130 km for typical itineraries; this is the full loop that includes the backcountry Paso John Gardner.

Best Time to Go: Main season is late spring to early autumn, with November to March the warmest and most reliable months; October and April are quieter but can bring snow and harder conditions.

Getting there: Most hikers base themselves in Puerto Natales and take shuttles or buses into the park to trailheads such as Laguna Amarga or Pudeto - many begin east and walk counterclockwise so the John Gardner pass falls near the end.

Costs: Expect park entrance fees on arrival and additional costs for boat crossings, refugio beds or organised transfers; refugios and campsites require advance booking in high season, so budget for reserved accommodation or full-self-supported camping gear.

Difficulty: Moderate to hard - long walking days, exposed and rocky sections, steep valley approaches and a high, exposed moraine at Paso John Gardner; the biggest hazards are strong Patagonian winds, rapidly changing weather and occasional snow outside the summer window.

Torres del Paine NP’s O Circuit loops the entire Paine massif, taking you from windswept Patagonian steppe into lenga forest, up into the glacially carved French Valley, and along the moraine ridges above Grey Glacier. The route shows off the park’s dramatic contrasts - granite spires, ice, and wide open plains - in close succession.

Highlights include the panoramic viewpoint into the French Valley, the long ridge and viewpoints above Grey Glacier, and the exposed crossing of Paso John Gardner where you get head-on views toward the glacier. The full circuit is markedly quieter than the shorter W route because it leaves the busier central valleys behind.

Accommodation is a mix of staffed refugios and designated campsites spaced a day or less apart, with longer remote stretches on the backcountry side that require carrying more food and equipment. The route is notable for being a true backcountry loop - it gives a full sense of remoteness while remaining on well-defined trails.

Puerto Natales is the usual gateway town; international travellers fly into Punta Arenas or Balmaceda and then take a bus south to Puerto Natales. From Puerto Natales there are regular buses and private transfers into Torres del Paine NP that drop hikers at park entrances such as Laguna Amarga or at the Pudeto ferry for access to Paine Grande.

Most walkers start from the eastern access points and walk counterclockwise, which places the high, glacial Paso John Gardner near the latter part of the trip and lets you finish near the Grey Glacier and Paine Grande area where services and transport options are concentrated.

The walkable season in Torres del Paine NP is typically October through April, with November to March offering the warmest temperatures and most reliable trail conditions. Snow and ice are possible in October and April and can close higher sections or make the John Gardner crossing more difficult.

Refugios and campsites fill quickly in December and January, so book well in advance for high season. Regardless of month expect strong winds, sudden temperature swings and frequent weather changes - carry layered clothing, windproof gear and be prepared to modify plans if conditions deteriorate.