Argentine Patagonia has unique rock formations and flora, very different from the rest of South America. The city of Bariloche, known for its ski slopes and snow in winter, is the gateway to the region that extends to the extreme south of the continent. In summer, the ideal time for this route, the landscape and climate change completely, making this trek enjoyable and less technical due to the lack of icy sections.  The 4 refuges that give the crossing its name are Frey, San Martín, Manfredo and Lopez, the main ones in the Nahuel Huapi national park.
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DAY 0 (before the expedition): Arrival in Bariloche. 
Transfer from the airport to the hotel not included. Food not included. Optional stay included.
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DAY 1: Cerro Catedral Base – Refúgio Frey
After breakfast at the hotel in Bariloche, we will continue via transfer for approximately 30 minutes to the base of Cerro Catedral, the start of the trail. We will pass by the beautiful Gutierrez Lake and a typical Patagonian forest full of woodpeckers. When we arrive at the camp, we will set up our tents and enjoy free time. Breakfast included at the hotel and dinner included at the refuge. Stay in tents or at the refuge.
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DAY 2: Frey Refuge - San Martín Refuge (Laguna Jakob)
More physically demanding day than the previous one. We will leave Frey at 08:00 right after our breakfast. The trail has a light start, bordering Lake Toncek until the beginning of the steep climb that leads to Lake Schmoll and then to the Rucaco valley. After crossing the valley we will ascend again to the mountain crest to reach Lake Jakob, our second refuge. Coffee and dinner included in the refuge. Stay in tents or at the refuge.
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DAY 3: San Martín Refuge - Manfredo Refuge (Laguna Negra)
It will be the most challenging day of the entire crossing. The first 30 minutes are calm until the Schweizer pass, from there a more technical section begins in which our guides, who are climbers, guide all participants up to Pico Refúgio (2,032m). We will follow a long stretch along the ridge to the highest point of the entire route, Cerro Navidad (2,103m). We will descend to the valley, climb again through the famous section called "snail", and arrive at our final destination of the day. Coffee and dinner included in the refuge. Stay in tents or at the refuge.
 
DAY 4: Manfredo Refuge - Lopez Refuge - Swiss Colony
Last day of our trek, one of the easiest of the four days but with the longest distance covered. We will ascend Cerro Bley Willis, we will have an incredible view of the region including Cerro Tronador, we will pass through the Lopez Refuge and finally the long descent to the Swiss Colony, the end of the crossing and where we will have our transfer back to Bariloche. Coffee included in the refuge .
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INCLUDED IN
Mountain transfer in/out from Bariloche
Camping stay at the campsites on the itinerary
1 WFA first aid guide in Portuguese, English and Spanish for every 5 people
Breakfast days 1, 2, 3 and 4
Dinner on days 1, 2 and 3 (drink not included)
All necessary safety equipment, including personnel
Advice on purchasing equipment before your trip
First aid kit for collective use
1 snack Captain Jack 
Online satellite tracking
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NOT INCLUDED
Transport to Bariloche - Argentina (round trip)
Airport hotel - airport transportation
DAY 0 stay in Bariloche
Trail food (snacks), in the city of Bariloche in the extra shelters included
All camping equipment, including tents (but with rental option)
Travel insurance
Rescue insurance