Distance
Around 80 to 100 km (roughly 50 to 62 miles) depending on exact side trips and whether you do the classic W or add small extensions, the standard route from Refugio Las Torres to Grey Glacier and back via the French Valley keeps it in that ballpark.

Time on the trail
Most hikers complete it in 4 to 5 days, averaging 15 to 25 km per day with big elevation changes, though some stretch it to 6 days for more relaxed pacing or bad weather buffer. It's not a race, plan for long days of walking, breaks for photos, and time to just stare at the scenery in awe.

What important along the way
You usually start from the east side near Refugio Las Torres (reachable by bus or transfer from Puerto Natales), climbing steadily through lenga forest to the base of the iconic Torres del Paine towers themselves, three jagged granite spires rising dramatically above a glacial lake, often glowing pink at sunrise if the weather cooperates. From there the trail drops to the French Valley with its hanging glacier and massive views over the Paine massif, turquoise waters, and hanging icefalls that make you feel tiny. Next comes the middle section around Lago Pehoé and the French River with chances to spot guanacos grazing on hillsides, condors soaring overhead, and maybe even a fox or huemul deer if you're lucky. The western arm takes you along the shores of Lago Grey, past floating icebergs calved from the huge Grey Glacier, with wind whipping across the water and the constant roar of ice cracking in the distance. The return leg often goes back via the valley floor or connects through Paine Grande area, passing more lakes like Nordenskjöld with its milky turquoise color, wildflower meadows in summer, and those ever-present granite peaks that change color with the light. Expect strong Patagonian winds that can knock you sideways, sudden rain or snow even in summer, and nights at refugios or campsites with basic but cozy setups, hot meals, and stories from other trekkers around the stove.

Who it suits
This trek is perfect for experienced hikers who have done multi-day backpacking before, can handle long days with heavy packs (or lighter if using refugio beds), and love pushing through variable weather for epic rewards. Solo explorers craving true remote wilderness, silence broken only by wind and birds, and that deep sense of being far from everything will find it addictive. Adventurous types who thrive on big landscapes, glacier views, and wildlife spotting in a raw, untamed setting fit right in. Small groups of friends who share the load and motivation work great too, and even couples who are both strong hikers enjoy the shared challenge and stunning sunsets. It's suited for people okay with carrying gear, dealing with mud, wind, and cold, and who come prepared for self-sufficiency in a national park. Not the best for beginners, people with knee issues (lots of rocky descents), or anyone who needs comfort and easy access, cause it's remote, services limited, and weather can shut down the trail fast.

Pack smart and light but warm, good waterproof layers are non-negotiable cause Patagonia weather flips in minutes, sturdy boots with grip for rocky and muddy sections, trekking poles for balance on steep bits, and a good sleeping bag even if staying in refugios. Book refugios or campsites way in advance during peak season (December to March), and always carry enough food and water treatment since options thin out. Seasons matter hugely: summer (Dec-Feb) for longer days and milder temps but crowds and wind, shoulder seasons (Nov, Mar-Apr) for fewer people and golden light, winter closed for most. Stop for hot chocolate or stew at the refugios, watch the towers light up at dawn, and let the vastness sink in. This isn't just a hike, it's stepping into one of the planet's last great wild places, with every mile building that quiet thrill of discovery and leaving you forever changed by Patagonia's raw beauty.