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Quintessential Patagonia Fly Fishing Experience

Your host and head guide Lucas, offers more than three decades of fishing experience on these very waters, sharing his earned wisdom with every Tres Rios guide to ensure your fly fishing expectations are exceeded in every way.


Years of experience


Unique adventures

Rivers waiting for you

The Chimehuin River is the crown jewel of Tres Ríos Casa de Campo. The smallest of the three rivers on the ranch, it is truly a dry fly fisherman’s paradise. Large overhanging willows, rock gardens, and slow eddies provide excellent cover for the numerous rainbow and brown trout that make the Chimehuin their home. Early in the season when the waters are still high, the numerous side channels are full of fish and offer easy wading access. As the season progresses and the water drops, the fish move out to the main river channel and can be accessed on foot or by drift boat. Prolific mayfly, caddis, and inchworm hatches throughout the season afford guests with excellent opportunities to sight-cast to rising fish. Larger flies including hoppers and Chernobyl Ants can draw violent strikes from big fish during the warmer hours of the day.

The Aluminé and Collón Curá Rivers are big freestone streams lined with large willows, beautiful high banks, and striking rock formations. Although they provide great hatches throughout the season, these two rivers are best known for their red-hot summertime terrestrial fishing. Large hoppers, beetles, and ants fished close to the banks bring explosive strikes as they float atop the gin-clear water. During the fall, large brown trout migrate up the Collón Curá to spawn. This concentration of fat and aggressive fish provides guests with the opportunity to catch the trout of a lifetime.

For a limited time only, book from now until the end of March and receive 10% off on this visit!

Tres Rios

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Frequently asked questions

What are the rates?

2024 Rates

Early Season until December 10th:

Double Occupancy: $850

Single Occupancy: $950

Single Occupancy (single guide person/night): $1100

December 11th to May 15th:

Double Occupancy: $1000

Single Occupancy: $1150

Single Occupancy (single guide person/night): $1200

What's included and not included?


  • Accommodations at the lodge
  • Ground transfers to and from San Martín
  • Daily guided fishing
  • All meals, fine wines, open bar
  • Daily laundry service
  • Fishing licenses
  • Fishing gear (high end rods, reels, waders, boots, sunglasses and rain jacket )

Not Included:

  • International airfare to Buenos Aires and domestic airfare to San Martín de los Andes
  • Transfers, hotels, and meals in Buenos Aires
  • Pick-up or drop off transfers over 100 miles are not included.  Midcurrent will be happy to help you arrange such services.
  • Gratuities for guides and lodge staff
  • Travel insurance

How do I get there?

Several airlines offer daily flights from the U.S. to Buenos Aires International Airport (Ezeiza). These are typically overnight flights, arriving in Argentina early in the morning. Guests often choose to spend a day or two enjoying the wonderful food and culture of Buenos Aires before flying to San Martín de los Andes (CPC) to begin their stay at Tres Ríos.

From Buenos Aires, guests fly from the domestic airport, Jorge Newbery Airport (AEP), via Aerolineas Argentinas to San Martin de los Andes (CPC). Upon arrival, guests are greeted by a representative from Tres Ríos and transferred directly to the lodge approximately 45 minutes away. On the day of your departure, lodge staff will return you to the airport for your return flight to Buenos Aires Jorge Newbery Airport.

Important: There are two major airports in Buenos Aires. Domestic flights typically leave from Buenos Aires Jorge Newbery Airport (AEP), which is located on the other side of BA from the international airport, Buenos Aires International Airport (Ezeiza). Make sure to allow plenty of time between flights for the transfer. Please allow us to help you with any transfers in and around Buenos Aires.

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When you visit Tres Ríos Casa de Campo, you’ll experience the warmth and hospitality of a traditional Patagonia household—as well as some of the best dry fly fishing in the world. Overlooking the Collón Curá Valley at the confluence of the Chimehuin and Collón Curá Rivers, the lodge offers an amazing array of fishing opportunities. You will have access to 9 miles of the lower Chimehuin, 4 miles of the upper Collón Curá as well as 4 miles of the lower Aluminé. The lodge only accommodates a single group of six to eight guests, so you have exclusive use of the ranch and all its amenities.