Freestone · Mixed · Navarra

Río Arga

Río Arga venue image
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Navarra's principal river, an Ebro tributary flowing south through Pamplona.

Species

A side-water session, not the main event

River high but settled. Tributary pocket water is the better play today.

75% confidence in this read
Water temperature for brown trout
Cool — slow
6°C est.ideal 1016°C
0°14°28°
Why this score · for brown trout
  • Temperature3528% weight
  • Flow9522% weight
  • Clarity9518% weight
  • Feeding Time5013% weight
  • Pressure807% weight
  • Prey Activity2812% weight
Conditions
Level
1.98 m
Water temp
6.0°C
Estimated
Clarity
Clear
Clearing
Air temp
6°C
Wind
N 6 km/h
Light breeze
Pressure
1019 hPa
Rain · 48h
1.0 mm
No meaningful rain
Rain · ahead
5.9 mm
Light rain · next 48h

Live readings — water temperature is an estimate where the gauge does not record it.

How to fish it · for brown trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
Good conditions. Flow is favourable (95), Prey activity is weakest (28).
Through the year
0–3 scale · May highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
1
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
1

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

Gallery · 1
  1. Terrain map of the venue
    Terrain map
Permits & access
Permit required — see local rules.
  • Gobierno de Navarra fishing licence required
  • Use the exact tramo and daily-permit structure for the section you plan to fish rather than assuming one simple Arga rule.
Directions
About this water

Navarra's principal river, an Ebro tributary flowing south through Pamplona. The Arga rises in the western Pyrenees and joins the Aragón before reaching the Ebro (Mediterranean drainage — no Atlantic salmon access). Limestone and granite headwaters transition to sandstone near the city. Productive brown trout water with pool-and-run structure. Dry fly and nymphing for summer trout in clear upper reaches; water turns brownish during spates.

  • Mixed
Seasons & zones
  • Trout1 May → 30 June
Other water nearby · 5
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