Sendero Laguna de los Tres

The Sendero Laguna de los Tres is a roughly 25 km out-and-back trail near El Chaltén in Patagonia, Argentina, gaining about 750 m of elevation and usually walked in a single 8 to 9 hour day. Rated demanding, it climbs to a turquoise glacial lagoon directly beneath the granite spires of Mount Fitz Roy, the most iconic viewpoint in Los Glaciares National Park.

About the Sendero Laguna de los Tres

The Sendero Laguna de los Tres is the signature trek of El Chaltén, a small town in the Santa Cruz province of southern Argentina that markets itself as the country's national trekking capital. The route starts from the northern edge of town and works its way through Lenga forest, across glacial valleys and finally up a brutally steep moraine to Laguna de los Tres, a milky-blue lake fed by the Glaciar de los Tres. Towering directly above it is Cerro Fitz Roy (3,405 m), known locally as Cerro Chaltén, the jagged peak that gives the region its dramatic silhouette.

Most hikers tackle the full 25 km as a long day hike, gaining around 750 m of cumulative elevation, with the trailhead sitting near 400 m and the lagoon at roughly 1,150 m. While the data lists this as a point-to-point route, in practice almost everyone walks it as an out-and-back from El Chaltén, returning along the same valleys. The trail is well signed and maintained by Los Glaciares National Park, but the final kilometre is steep, rocky and exposed, which is why it earns its demanding grade despite the modest total distance.

The hike is free to walk on most approaches, though parts of the national park now carry an entry fee. Because the route passes two free base camps, fit and well-prepared hikers can also split it across two days, camping overnight to catch sunrise on Fitz Roy, when the granite walls glow deep red. If you are budgeting calories for a big day out, our guide to how many calories you need hiking a full day is a useful starting point.

Route Overview & Stages

The numbers below describe the outbound leg from El Chaltén to Laguna de los Tres. Double the distance for the full out-and-back day, and remember the descent of the final moraine is as hard on the knees as the climb is on the lungs.

Total one-way distance is roughly 12.5 km, making about 25 km for the return trip. Plan on 8 to 9 hours of moving time for an average hiker, plus generous stops for photos and lunch at the lagoon.

Highlights & Points of Interest

• Mirador Río de las Vueltas — the first viewpoint, reached within 15 minutes of leaving town, looking down the braided Río de las Vueltas toward the steppe.
• Mirador Fitz Roy — the panoramic balcony where the full Fitz Roy massif, including Aguja Poincenot and Aguja Saint-Exupéry, first comes into view.
• Laguna Capri — a forest-rimmed lake on a short detour, with a free campsite and a classic foreground for Fitz Roy photographs.
• Campamento Poincenot — one of the busiest free base camps in the park, sheltered among Lenga trees and the usual overnight stop for sunrise hikers.
• Río Blanco crossing — the bridge over the milky glacial river just before the final climb, marking the start of the toughest section.
• Laguna de los Tres — the turquoise glacial lagoon at the foot of Fitz Roy and the Glaciar de los Tres, the trail's namesake and grand finale.
• Mirador Laguna Sucia — a short scramble to the left of the lagoon delivers a dizzying view down to Laguna Sucia and its plunging waterfall.
• Glaciar Piedras Blancas viewpoint — accessible via a connecting trail near Poincenot for those wanting to extend the day.

Best Time to Hike the Sendero Laguna de los Tres

The Patagonian hiking season runs from roughly November to March, the southern hemisphere's late spring through early autumn. During these months daytime temperatures in El Chaltén typically sit between 8 and 18 degrees Celsius, the high moraine is usually free of snow, and daylight stretches well past 9 pm, giving slow hikers a comfortable buffer.

As of 2026, February is the single best month to walk the Sendero Laguna de los Tres. By then the worst of the early-summer snow has cleared from the final 1 km climb, river levels have dropped, and the ferocious spring winds that batter Patagonia in November and December have eased slightly. December and January are also excellent but busier and windier; March brings the first autumn colours to the Lenga forest but also a higher chance of early snow on the upper section.

From April to October the trail is technically open but the final ascent often holds snow and ice, the days are short, and access can be limited by weather. Whatever month you choose, Fitz Roy is notorious for hiding in cloud, so build a spare day into your El Chaltén stay to wait out a bad forecast. Up-to-date trail and weather conditions are published by Los Glaciares National Park and at the park's visitor centre in town.

Practical Information

Accommodation

El Chaltén has the full range of lodging, from dormitory hostels at around 18 to 30 EUR per bed to private hotel rooms from roughly 80 to 150 EUR per night in peak season. Booking ahead for December to February is strongly advised, as the town is small and fills up.

On the trail itself, the two base camps — Campamento Poincenot and the smaller Laguna Capri site — are free, first-come-first-served and have no facilities beyond pit toilets and stream water. There are no staffed mountain huts on this route, so camping means carrying a fully self-sufficient tent setup. If you camp, treat or filter all water and pack out every scrap of rubbish, as the park enforces a strict leave-no-trace policy.

Getting There & Back

The nearest airport is El Calafate (FTE), about 220 km south, with daily flights from Buenos Aires (roughly 3 hours). Frequent shuttle buses connect El Calafate to El Chaltén in around 3 hours, and several companies run the route daily in summer. From El Chaltén the trailhead is a short walk: the path begins at the northern end of Avenida San Martín, where the town ends and the parking area starts, so no extra transport is needed to reach the start.

Permits & Fees

Los Glaciares National Park has introduced an entry fee for parts of the protected area, payable online in advance through the official Argentine government portal. Fees and exemptions change from season to season, so confirm the current rate and which trail sectors require a ticket before you travel via the official national park website. No separate permit is needed to camp at the free base camps, but you must register your intentions at the visitor centre and follow all fire and camping regulations.

Gear & Packing List

This is a big-mileage day in fast-changing mountain weather, so pack for sun, wind and possible snow on the same outing. Essentials include layered clothing with a windproof shell, sturdy trail shoes or boots with good grip for the rocky final climb, trekking poles for the steep descent, at least 2 litres of water capacity, sun protection and plenty of high-energy food.

A comfortable 30 to 45 litre pack is ideal for the day hike. The lightweight 2400 Windrider and roomier 3400 Windrider are strong choices if you plan to camp overnight at Poincenot, while the Abisko Hike 35 suits a fast day push. If you are comparing options, our roundup of the best ultralight backpacks of 2026 breaks down which packs handle Patagonian wind best. Build your kit and track its weight in our gear database before you fly.

Similar Trails You Might Like

If the Sendero Laguna de los Tres whets your appetite for granite peaks and multi-day mountain walking, there are plenty of comparable routes worth planning next. For a European alternative with dramatic alpine scenery and hut-to-hut walking, read our guide on how to hike the Theth to Valbona trail in Albania, which shares the same demanding-but-rewarding character as the climb to Laguna de los Tres. As more related Patagonian trails are added to HikeLoad, you will be able to link them directly to your own day-by-day plans.

Frequently Asked Questions

When is the best time to hike the Sendero Laguna de los Tres?
February is the best month, when the final moraine is usually snow-free, rivers are lower and the strongest spring winds have eased. The wider season runs November to March, with long daylight and mild 8 to 18 degree Celsius days. From April to October the upper section often holds snow and ice.

How difficult is the trail?
It is rated demanding. The first 11 km are moderate forest and valley walking, but the final 1 km gains around 400 m up a steep, rocky moraine. No technical climbing or scrambling gear is required, yet good fitness, sturdy footwear and trekking poles for the descent make the 25 km round trip far more comfortable.

How far do you walk each day?
Most people complete the full route in one long day of about 25 km return, taking 8 to 9 hours of moving time. If you split it across two days, you typically walk around 10 km to a base camp such as Poincenot on day one, then cover the steep final climb to the lagoon and the full descent on day two.

What accommodation is available?
El Chaltén offers hostels from roughly 18 to 30 EUR per bed and hotels from about 80 to 150 EUR per night in peak season. On the trail, the free base camps at Poincenot and Laguna Capri have only pit toilets and stream water, so camping requires a fully self-sufficient tent setup carried in and out.

Do you need a permit or pay a fee?
Los Glaciares National Park now charges an entry fee for parts of the park, bought online in advance through the official Argentine government portal. Rates and exempt sectors change each season, so confirm before travelling. Camping at the free base camps needs no separate permit, but you should register at the El Chaltén visitor centre first.