Patagonia Hiking Circuit Gaining Traction

The "Full O Circuit," also called the "O Circuit," or "Torres del Paine Loop," is considered one of Patagonia's best multi-day hikes for experienced trekkers. The route is roughly 85 miles (136 km) and usually takes 7 to 8 days to complete. The O Circuit includes the popular "W" trek but extends into the quieter, more remote northern section of Torres del Paine National Park. Hiking the O Circuit allows trekkers to see the Southern Patagonian Ice Field and Grey Glacier. British mountaineer John Garner, along with two park rangers, pioneered the Circuit trail in 1976. The John Garner Pass, the highest point on the O Circuit at 1,200 m (3,900 ft), offers views of the Gray Glacier and the Southern Ice Fields. The pass can be challenging to cross due to steep ascents and strong winds that can reach 120 km/h. While the O Circuit doesn't require mountaineering experience, a good fitness level is essential due to the Patagonian weather and the trek's length. Trekkers typically carry packs weighing 22-33 pounds (10-15 kg) and walk up to 12 miles (19 km) daily. The park is open year-round, but the O Circuit is only open from November 1 to March 31, during the Southern Hemisphere summer. This is when trail conditions are safer, river levels are manageable, and all campsites are operational. Reservations for campsites are required before starting the O Circuit. It is also highly recommended to coordinate with other hikers before crossing Paso John Gardner without a guide. Torres del Paine faces threats from tourism, including erosion and forest fires. The Torres del Paine Legacy Fund supports reforestation, trail restoration, and recycling. Besides the O Circuit, more challenging options exist, such as adding the Oggioni Pass or completing the "Q" Trek, which includes additional sections to the west of the Paine Massif.