Completing the Four Mountain Huts Trek is one of the most complete and challenging trekking experiences in Argentine Patagonia, crossing some of the most spectacular mountain landscapes in Nahuel Huapi National Park.

This route connects four mountain huts — Frey, Jakob, Laguna Negra and López — through high-altitude trails, exposed ridges, scree slopes and technical passes, along a journey that requires physical endurance, planning and mountain experience.

The circuit takes place over several days, crossing glacial valleys, high-altitude lagoons, Andean forests and rocky terrain, with constant views of peaks, granite spires and vast stretches of forest and lake.

Each day presents new challenges: demanding ascents, technical descents and weather conditions that can change abruptly. Spending the night in mountain huts or camping in these remote environments allows for a complete immersion in nature.

Day 1: Cerro Catedral Base – Emilio Frey Hut

Difficulty: Moderate (Nov–Apr), High (May–Oct)
Distance: 10 kilometres
Elevation gain: 700 metres
Walking time: 4 to 5 hours

Day 2: Emilio Frey Hut – San Martín Hut (Laguna Jakob)

Difficulty: High (Nov–Apr), Very High (May–Oct)
Distance: 9 kilometres
Elevation gain: 530 metres
Walking time: 8 to 10 hours

Day 3: San Martín Hut (Laguna Jakob) – Manfredo Segre Hut (Laguna Negra)

Difficulty: Extreme (year-round)
Distance: 10 kilometres
Elevation gain: 850 metres
Walking time: 8 to 10 hours

Day 4: Manfredo Segre Hut (Laguna Negra) – López Hut

Difficulty: High (Nov–Apr), Very High (May–Oct)
Distance: 8 kilometres
Elevation gain: 500 metres
Walking time: 5 to 6 hours

Day 5: López Hut – López Stream

Difficulty: Moderate (Jan–Mar), High (Apr–Dec)
Distance: 4 kilometres
Elevation loss: 1,260 metres
Walking time: 3 to 4 hours

Geographical location: Bariloche, Río Negro Province

Price: $$–$$$ (camping or overnight stay in the mountain huts)

Duration: 5 days

Type of activity: Extreme adventure tourism, multi-day mountain trekking

Best season: December to March

Requirements: Previous mountain experience; plan the route and stages in advance; hut reservations are mandatory; bring proper equipment; check weather conditions.

Advice: Do not underestimate the trek; carry a map or GPS; respect park regulations.