Freestone · Alluvial · Tierra del Fuego

Río Irigoyen

Río Irigoyen venue image

The Irigoyen shares the same Fuegian steppe country as Río Grande, and the same sea-run browns move through its alluvial water, though it carries a far lower profile and correspondingly less documented access.

Poor · Sea Trout
Black & Silver Tube · 1-2 inch
Closed season
Season reopens 1 November. Plenty of other water available now.
Closed — confidence not applicable today.
What moved it
  • LevelDry recentlyNo gauge reading
  • Water temp6.9°C
  • ClarityClear
Today's fly
BS
Black & Silver Tube1-2 inch
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
Conditions on the water
Estimate
Level
Dry recently
No gauge reading
Water temp6.9°C
ClarityClear
Weather2°C
WindW 20 km/h
Pressure1016 hPa
Rain · recent0.0 mm
Rain · ahead0.2 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Water temperature for Sea Trout
Cool — slow
7°C est.ideal 8–15°C
0°14°28°
How to fish it · for Sea Trout
When
From dusk into the first half of the night.
Where
Deeper pools and slower glides · hold water and current seams.
Method
Fish dark patterns on a sink-tip or lightly sunk line, especially near structure.
Kit
10 ft #6/7 rod, floating line with a sink-tip option, 8–10 lb fluoro tippet for the swing.
Hatch timeline · todayQuiet day

Hatch predictions

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Sub-surface · on the nymphunder the surface

Hatch predictions

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Evidence
ModelledModerate confidence

Modelled from regional ecology — no survey or occurrence data for this water yet.

Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Sea trout runRun
2
2
2
2
1
1
2
Trout seasonSeason
2
2
2
2
1
1
2
Andesiops (Patagonian Olive)Hatch
3
3
3
2
2
3
3
Patagonian Mayfly (Large)Hatch
3
3
2
2
3
Smicridea (Patagonian Caddis)Hatch
3
3
3
2
2
3
Patagonian Stonefly (Large)Hatch
2
2
3
3

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Sea Trout fly box
BS
Black & Silver TubeTop
1-2 inch · Tube
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
SF
Snake Fly (Black)
2-4 inch · Streamer
A mobile eel-like profile that undulates through deep pools — effective when sea trout are lying deep and not responding to conventional wets.
Permits & access
Permit required — see local rules.
  • Argentine Patagonian continental permit (or Chilean Sernapesca licence) required
  • Rules vary by province, National Park and reach — confirm annexes before fishing.
What's coming
Plan ahead
5-day outlook
Other water nearby · 1
Río Grande, Tierra del Fuego
78 km
Brown trout · Sea trout
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

The Irigoyen shares the same Fuegian steppe country as Río Grande, and the same sea-run browns move through its alluvial water, though it carries a far lower profile and correspondingly less documented access. Fish arriving from the sea take streamers with the same unhurried authority seen throughout Tierra del Fuego's sea-trout rivers — Sunray Shadows, Stoat's Tails and Collie Dogs worked through likely holding water at first and last light suit it well. Wind off the open steppe is relentless and shapes every decision about where and when to fish. Access here is lodge or private-led almost without exception, and given how little is independently verified about specific beats and timing, arranging a guide and a firm booking in advance is essential rather than optional. Treat it as serious, specialist sea-trout water that rewards patience and local knowledge over improvisation.

  • Alluvial
Why this score · for Sea Trout
  • Temperature6928% weight
  • Flow6022% weight
  • Clarity8518% weight
  • Feeding Time7013% weight
  • Pressure857% weight
  • Insect activity2912% weight
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Sea trout 1 November → 1 May
  • Trout 1 November → 1 May

Sea trout: Variable seasonal (2026)

Related guides
Euro Nymphingsubsurface methods
Booking & contacts