Thunder Pass Trek

Complete a 4-day off-trail trekking circuit in the remote and pristine fjords of Canal de Montanas with absolutely no one else in sight. Cross over the Thunder Pass for panoramic views of the Sarmiento Range and surrounding glaciers. With the support of a floating refuge and rib boats you will explore the hidden glacial lagoons and waterways. A truly unique style of trip close to Puerto Natales.

4 Days


Thunder Pass Trek - 4 - $2,114

Trip Summary and Itinerary Map

  • Ferry across the Senoret channel to the Antiono Varas peninsula, located in front of Puerto Natales
  • Take a fast boat to the Resi Fjord , perhaps seeing seals, dolphins, penguins, condors and other wildlife 
  • Trek by imposing mountains until arriving at Thunder Lagoon, one of the surrounding rock walls has transformed into a pass which is possible to trek trough, known as Thunder's Pass
  • Hike to a panoramic lookout of the glaciers Alsina & Paredes, that fall down from the icy summits of the Sarmiento mountain range 
  • Take a boat to Bernal glacier, hike along its colourful moraines that cross its pro-glacier lake, getting close enough to touch its ice

Landmarks visited on Thunder Pass Trek

Operator's Itinerary

Day 1: Puerto Natales

You'll begin by taking a ferry to go across the Senoret channel to the Antonio Varas peninsula, located in front of Puerto Natales. Then you'll continue by car for 45 minutes through a gravel road , to the embarking spot. Here you can stop for lunch. Afterwards you take a boat and navigate one and a half hours until the end of the Resi fjord. Here you'll have your first mobile campsite with a dome as shelter along with a dinning room. On the way you might see seals, dolphins, penguins, cormorants, condors, and other species. If the weather conditions are favourable and lets you arrive early, you'll hike in the surroundings to watch and appreciate the beauty of the area. You'll finish the day with a tasty dinner in our dome.

Meals: Dinner

Accommodation: Campsite 

Day 2: Thunder Pass

After breakfast you begin your trekking circuit. You'll go 8 km through a beautiful valley characterised by evergreen forests, waterfalls, peatland, rocks and moraines colonised by lichens and mosses. You'll trek for about 4 hours by imposing mountains with whimsical shapes until you arrive at the "Thunder" lagoon, which is surrounded by huge rock walls that looks like an amphitheater.

The powerful action of a gone glacier has transformed one of these rock walls into a pass with terraces that makes it possible to trek through and cross till the mountains' fjord. This is the "Thunder Pass". You'll enjoy your boxed lunch somewhere while you go across it. From the pass it's possible to see some of the summits cover by centenary ice which belong to the Sarmiento mountain range. You'll continue through moraines and erratic rocks passing by two beautiful lagoons until you finally have a clear view of the entire fjord. It appears tiny surrounded by huge mountains and glaciers in the horizon. From here, the terrain towards your second campsite, in front of the Kiara glacier, is more rocky and solid, making it an easier hike. Here, you have a dome for shelter and dinning room to enjoy another nice dinner with an exclusive panoramic view.

Meals: Breakfast, lunch, dinner

Accommodation: Campsite 

Day 3: Trek Bernal Glacier

The day starts with a good breakfast. Then you'll navigate 10 minutes from the campsite towards the North, to a beautiful beach with a glacier in the background. Here begins your trekking; you'll gain one thousand feet of elevation until you get to a panoramic lookout of the glaciers Alsina and Paredes, that fall down from the icy summits of the Sarmiento mountain range till the fjord itself.

Later, you come back down to the beach the same way you went up, but this time you'll trek 7.5 miles towards the South. Half way you'll pass by where your last campsite was. The terrain is similar to what you would have seen already; rivers, erratic rocks and curious birds that will follow you as you go. Somewhere on the way you'll stop to eat your boxed lunch. You will arrive to a bay in front of the Hermann glacier, where the boat awaits for you to take you across the fjord, 10 minutes until the Bernal glacier. You'll disembark in the coast and then hike through a particular trail with colourful moraines that cross the pro-glacier lake, allowing you to get close and safe enough to touch its ice. This permits you to watch and understand its movements and the changes it makes to the landscape throughout the years, complemented with a pleasant speech given by our professional local guide. The contrast of colours between the vegetation, the ice, the mountains and the fjord in the background, makes any picture postcard worthy. After visiting this glacier, you navigate again in our fast boat another 15 minutes to the remote Huiros bay, where you will find our exclusive floating refuge "Explorador", where you'll enjoy the facilities, a hot shower and a delicious parting dinner.

Meals: Breakfast, lunch, dinner

Accommodation: Floating Refuge

Day 4: The Alacufe path - Depart

After a nice breakfast, you'll head back to Puerto Natales, hiking through the "Alacalufe" path, named as the canoeist ancestors who inhabited all the fjord lands in the last 5,000 years,. They used this pass to connect the Mountains' fjord with the Resi fjord. After one and a half hour of hiking, you'll reach the Acantilados lake, which is incased between huge rock walls; it's only possible to go across by boat, taking five minutes. Once at the other side, you walk for another 30 minutes to arrive to the Resi fjord. Here you take your fast boat to navigate one and a half hour until the Antonio Varas peninsula as day one. You eat your lunch and continue until Puerto Natales, finishing this trip around 16:00.

Meals: Breakfast

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Prices, Departures and Inclusions


  • Meals stated in the itinerary above 
  • 2 nights accommodation in mobile camping sites 
  • 1 night accommodation at the 'Explorador' refuge


  • Flights
  • Meals not indicated in itinerary
  • Personal expenses and equipment
  • Travel insurance
  • Gratuities
  • Any visa, passport and vaccination expenses

Questions about this Trip?