Of all the fish an angler can catch in Patagonia, the landlocked salmon is the rarest and, for many, the most coveted. It is a true Atlantic salmon that lives its entire life in fresh water, never running to the sea — and in Argentina it has one true stronghold: the turquoise pools of the Río Traful, near Bariloche. Landing one is a genuine Patagonian trophy, and a fish very few travelling anglers ever tick off.
Landlocked salmon in Argentina — the facts
- Species: landlocked Atlantic salmon, Salmo salar (the “sebago” strain). Not a Pacific salmon.
- Also called: salmón encerrado (Spanish); ouananiche; sebago salmon.
- Status: introduced from Maine, USA, in the early 1900s; wild and self-sustaining in a few waters.
- Average size: 2–5 lb, with fish to 26–27 inches.
- Where: the Río Traful is the premier fishery; also Lakes Nahuel Huapi, Traful, Espejo and Gutiérrez.
- Season: November to May.
- Top tactics: fly fishing with streamers, and fishing the lake mouths (bocas).
Atlantic or Pacific? What the landlocked salmon really is
This is the question that trips up most visiting anglers, so let’s settle it: the Patagonian landlocked salmon — the salmón encerrado — is a landlocked Atlantic salmon (Salmo salar), not a Pacific salmon. It descends from the famous “sebago” strain of Maine, whose eggs were shipped to Argentina in the early 1900s and released into the lakes around Bariloche. Unlike Pacific salmon (Chinook and others), which also exist in parts of Patagonia and die after spawning, the Atlantic salmon does not necessarily die after it spawns — it can survive and spawn again, which is one reason a healthy landlocked population can sustain itself. The word “landlocked” simply means the fish completes its whole life cycle in fresh water, using a big lake in place of the ocean.
The Río Traful: Argentina’s landlocked salmon river
If you want to catch a landlocked salmon in Argentina, the Río Traful is the place. Running from Lake Traful toward its confluence with the Limay, the Traful is the only river in Northern Patagonia that holds a genuinely healthy, self-sustaining population of landlocked Atlantic salmon, which migrate through the system between the lakes. Its famous turquoise pools and rock formations make it one of the most beautiful rivers in the region, and its salmon — alongside big resident brown and rainbow trout — have drawn fly fishers for generations. The original stockings also spread the fish into Lakes Nahuel Huapi, Espejo and Gutiérrez, where they still turn up, but the Traful remains the heart of the fishery.
How big do landlocked salmon get?
Landlocked salmon are a modest-sized fish compared with their sea-run cousins, which is part of what makes a good one so prized. In the Traful, most run 2 to 5 pounds, with the best fish reaching 26–27 inches and a solid weight to match. They fight far above their size — fast, dogged and prone to jumping — and because they are relatively scarce, every one feels like an occasion.
How to tell a landlocked salmon apart
At a glance a landlocked salmon can be mistaken for a brown or rainbow trout, but there are clear tells:
- Landlocked salmon (Salmo salar): a sleek, silvery fish with a slightly forked tail, small black X- or cross-shaped spots scattered mainly above the lateral line, and a smaller mouth than a brown trout of the same size.
- Versus brown trout: browns are more golden, heavily spotted with red and haloed spots, with a square tail and a larger mouth.
- Versus rainbow trout: rainbows show a pink stripe and spotting across the whole tail, which the salmon lacks.
When to go and when they spawn
The season runs from November to May. Landlocked salmon fish well early in the season and again in autumn, when they concentrate and move to spawn. Like Atlantic salmon everywhere, they spawn in autumn on gravel, and — unlike Pacific salmon — the adults can survive to spawn in future years. Autumn fish are at their most aggressive and their most beautifully coloured. For the wider picture, see the best time to fly fish Argentina.
How landlocked salmon are fished
In their native Maine, landlocked salmon are famous for being trolled with tandem streamers that imitate smelt. In Argentina the game is a fly rod:
- Streamers: the classic approach — swinging and stripping baitfish patterns through the runs and pools, often imitating pejerrey and other small fish the salmon feed on.
- Boca fishing: targeting fish at the lake mouths, especially at dawn and dusk, where salmon hunt along the current seams.
- Wet flies and nymphs: effective through the Traful’s pools when fish are holding rather than chasing.
Because it is a true Atlantic salmon, the fish will also take the classic feather-wing Atlantic salmon flies, though in Argentina most anglers rely on streamers and wets. A 6- or 7-weight rod with floating and intermediate lines covers most situations.
Handling and conservation
Because the landlocked salmon population is small and localised, careful catch-and-release matters more here than almost anywhere. Fish barbless, keep the fish wet, handle it as little as possible, and let it recover fully before release. Protecting these fish — and their spawning gravel in autumn — is what keeps this rare fishery alive.
Plan your Argentina landlocked salmon trip
A landlocked salmon on the fly is one of Patagonia’s rarest prizes, and the Traful is the place to chase one. Tell us your dates, budget and style, and we will match you with the guides and lodges who know this special fishery best.
Frequently asked questions about Landlocked Salmon
Is the landlocked salmon an Atlantic or a Pacific salmon?
It is a landlocked Atlantic salmon (Salmo salar), from the Maine “sebago” strain, known in Spanish as salmón encerrado. It is not a Pacific salmon.
Do landlocked salmon die after spawning?
Not necessarily. Unlike Pacific salmon, which die after spawning, Atlantic salmon — including landlocked ones — can survive and spawn again in later years.
Where can you catch landlocked salmon in Argentina?
The Río Traful near Bariloche is the premier fishery — the only river in Northern Patagonia with a healthy population. They also occur in Lakes Nahuel Huapi, Traful, Espejo and Gutiérrez.
How big do landlocked salmon get in the Traful?
Most run 2–5 lb, with the best fish reaching 26–27 inches. They fight hard and jump often, well above their weight.
What is a landlocked salmon called in Spanish?
Salmón encerrado. It is the same fish North Americans call landlocked salmon, sebago salmon or ouananiche.
How did landlocked salmon get to Patagonia?
They descend from landlocked Atlantic salmon eggs shipped from Maine, USA, in the early 1900s, and were released into the lakes around Bariloche — Nahuel Huapi, Traful, Espejo and Gutiérrez.
How do you tell a landlocked salmon from a trout?
It is a sleek, silvery fish with a slightly forked tail, small black X- or cross-shaped spots mainly above the lateral line, and a smaller mouth than a brown trout of the same size.
What flies work for landlocked salmon?
Streamers are the classic approach — baitfish patterns that imitate pejerrey, swung and stripped through the pools. Wet flies and nymphs work when fish are holding, and because it is a true Atlantic salmon it will also take classic feather-wing salmon flies.
When is the best time to fish for landlocked salmon?
The season runs November to May. Landlocked salmon fish well early in the season and again in autumn, when they concentrate and move to spawn — the most aggressive and colourful time.
Why is the landlocked salmon a rarity in Argentina?
The original stockings succeeded in only a few waters, and the Traful is the one river in Northern Patagonia with a genuinely healthy, self-sustaining population — which is exactly what makes catching one such a prized, uncommon trophy.