Freestone · Volcanic Glacial · Río Negro / Neuquén / PN Nahuel Huapi

Río Limay — Upper / PN Nahuel Huapi

Río Limay — Upper / PN Nahuel Huapi terrain map
Terrain map

Upper Río Limay reach from the Nahuel Huapi outflow area towards the Traful confluence.

Species

A proper day on the water

Low and clear — careful approach country. Stay small, stay accurate.

55% confidence in this read
Water temperature for grayling
Ideal
7°C est.ideal 4–14°C
0°14°28°
The full read · show the working · for grayling · confidence 55%
How the 73 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time15 × 13%2.0
Pressure80 × 7%5.6
Insect activity40 × 12%4.8
Conditions total= 73
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Conditions
○Regional est.
Level
Dry recently
No gauge reading
Water temp
7.1°C
Estimated
Clarity
Clear
Air temp
3°C
Wind
NE 8 km/h
Light breeze
Pressure
1019 hPa
Rain · 48h
0.0 mm
No meaningful rain
Rain · ahead
4.0 mm
Light rain · next 48h

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

Evidence
ModelledModerate confidence

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

How to fish it · for grayling
When
Midday window — grayling feed best from late morning into early afternoon.
Where
Work runs and glides — grayling shoal in the bottom third of the water column.
Method
Tight-line nymph the bottom third with weighted patterns.
Kit
10 ft #3 rod, floating line, long leader to 4 lb fluoro for nymphs.
Why this works
Good — water temperature is working for you, but time of day is the limiting factor today.
Through the year
0–3 scale · June highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
2
2
2
2
1
1
2
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Western Green DrakeHatch
2
2
Flav (Small Western Green Drake)Hatch
2
3
2

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

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.
Directions
Apple MapsGoogle Maps
About this water

Upper Río Limay reach from the Nahuel Huapi outflow area towards the Traful confluence. Created in Pass 3 because the former single Limay record mixed materially different National Park/upper-river rules with lower Limay dam-reach rules.

  • Volcanic glacial
Seasons & zones
  • Trout1 November → 31 May
Other water nearby · 3
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