Arrive at any time. If arriving into Punta Arenas in Chile, it is recommended to arrive prior to 14:00 to allow enough time to transfer to Puerto Natales for the welcome meeting. If arriving to El Calafate in Argentina, you will need to get there a day before and then take the bus to Puerto Natales today.

Embark on a 9-day excursion within Torres del Paine NP, hiking the full Torres del Paine circuit known as the O circuit. Start the 130km (80.7 mi) route by trekking to the base of Las Torres to see the dramatic three towers and turquoise lagoon below. The group will enter the park through the Lago Sarmiento gate. The trail begins with a gentle slope and a side view of the imposing Sarmiento Lake that borders private land. It also happens to be a common hunting area for the largest predator in the region, the Puma. After about an hour's walk you'll arrive at an overhang where it is possible to see a series of cave paintings which date back more than 6,000 years. Take some photos of the surroundings as you learn more about the local history. From there the group will continue towards the Blanquillos Lagoon, which is a nesting and feeding place for different species of endemic birds of Patagonia. After 3 hours of walking, the group will arrive at the main access to Torres del Paine National Park; the Laguna Amarga gateway. Then it's off to a little-known area where the milky waters of the Paine River from the Dickson Glacier turns into the Paine Waterfall. Here you will have free time to enjoy a box lunch with gorgeous views of the Paine mountain range. The day continues towards Canadon Macho, an area where it is possible to observe large groups of guanacos that coexist with species such as the nandu, Gray Fox, Condor, Black Eagle, among others. After that, we'll arrive at the first campsite in Laguna Azul.

Transfer by van to the Las Torres area. The trek will take you to the Ascencio Valley today where from above you can see the Ascencio River running wildly past Refugio Chileno. Continue on through a forest of native Lenga (Beech) trees until you reach the glacial moraine. Then, it's a 1-hour trek to the top where the towers appear from nowhere! The hike today will be about 7 hours round trip and a total of 19 km. In the evening the group will return to the Laguna Azul camp.

Begin today on the Macizo Paine circuit along the original route taken by the first adventurers who came to this park. Walk along the northern part of the Laguna Azul before passing by the side of the Cebolla Lagoon. After a few hours of hiking the group will make its first stop at an old cattle post called La Victorina, where there will be time to rest and enjoy a box lunch. Then, continue walking and crossing footbridges and rivers until the group arrives at Paine Lake. This lake offers an incredible view of the northern part of the Paine Massif. Once the group arrives at the Dickson Lake area they will cross the river in a zodiac boat to arrive at the Dickson Campground.

Continue along the north side of the park to an incredible lookout point of Lake Dickson and the surrounding valley. Follow the trail through the tall forest to reach another lookout for Perros Glacier, well worth the climb. Pack up and head out through pristine, old growth beech forest. Look and listen for the red-headed Magellanic woodpecker. Just before we arrive to camp, trek past the Perros glacier and enjoy fantastic close-up views of the ice and the lake. Spend the night camping at the base of Paso John Garner at Los Perros.

Today is the toughest day of the O trek, start with an uphill climb for 2-3 hours, passing over the highest point. Take in the first view of Grey Glacier and gaze into the distance to take in its 270km² (104 mi²) spread. Climb vertical ladders and pass a suspension bridge en route to Grey Camp. This is the biggest day yet as we climb over Paso John Garner and hike down through thick forest directly above the massive Grey Glacier. Once on the pass, look out over rugged, glaciated peaks and the Southern Patagonia Ice Cap – a view not to be missed! The glacier stretches out below like a giant white highway.

Enjoy the day exploring Grey Lake and Grey Glacier. The spectacular scenery is a highlight of the trek with the back drop of snow-capped mountains and floating pieces of piercing blue glacier.

Hike along Lake Grey to appreciate different view points of the glacier. Hike to join the famous W Trek and end at Lake Pehoe. Relax at Paine Grande Camp and share trekking stories with the other hikers. Cross a high plateau overlooking Grey Lake and see icebergs and views across Grey Glacier on the way to Lake Pehoe. Pehoe means "hidden lake" in the Tehuelche language. The afternoon is free to relax at Lodge Paine Grande and enjoy the area. At night, enjoy a pisco sour cocktail in the bar overlooking Paine Grande & Los Cuernos mountains.

Hike to the French Valley lookout to see the mountain range spread across the national park, take in the contrasting greens and greys of the landscape. Continue the trek to the French Valley. Surrounded by hanging glaciers and an amphitheater of granite walls and spires, this is the most beautiful valley in the park and one of the most unique in the world. After, trek out of the valley to the extraordinary turquoise Lake Nordenskjold. After six to eight hours, end the day at Cuernos Camp for dinner and sleep.

The concluding day of the O circuit continues along Lake Nordenskjoeld. Take in the final views of Torres del Paine, reflect on the last nine days and relish in the sense of accomplishment before heading back to Puerto Natales. Trek along Lake Nordenskjoeld and below the hanging glaciers of Mount Almirante Nieto, to the reach Hosteria Las Torres, where our van awaits us. Transfer to Puerto Natales.

Onward travel should be booked no earlier than 4:00pm.