Foothill Freestone · Mixed · US, US

North Fork Yuba River

North Fork Yuba River terrain map

The North Fork of the Yuba is classic Sierra freestone — a tumbling, granite-bottomed river of plunge pools and pocket water threading through the canyon, holding wild rainbows that fight well above their weight and browns that grow heavier and warier in the deeper lies.

Tomorrow · Slow going — pick your moments
Pheasant Tail
Forecast · Tomorrow
Slow going — pick your moments
Slow going — pick your moments and do not force it.
45% projected
Today's fly
Pheasant Tail
Pheasant Tail
Conditions on the water · Tomorrow
Live gauge
Level
Rising
0.51 m
Lifting fast
Water temp11.2°C
ClarityVery coloured
Weather10°C
WindN 17 km/h
Pressure1012 hPa
Rain · recent0.0 mm
Rain · ahead0.1 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Brown Trout
Ideal
11°C est.ideal 1016°C
0°14°28°
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
Excellent — water clarity is right today, though insect activity could be better.
Likely species
Hatch timeline · tomorrowPeak at 12pm

12pm(now) Mahogany Dun

Stage: On emergersApproach: Emerger or dryActivity: 63%
Peak emergence windowDegree-days at peak4 food groups active

Peak activity at 12pm — Mahogany Dun (Mahogany Dun, Peak emergence window)

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds with Pro.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

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Evidence
Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Brown DunHatch
2
3
3
3
3
3
3
2
Western Green DrakeHatch
2
2
Flav (Small Western Green Drake)Hatch
2
3
2
Mahogany DunHatch
2
2

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

Ranked for today
Brown Trout fly box
SD
Sex Dungeon
2-6 · Pattern
Proven pattern for this period
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
About this water

The North Fork of the Yuba is classic Sierra freestone — a tumbling, granite-bottomed river of plunge pools and pocket water threading through the canyon, holding wild rainbows that fight well above their weight and browns that grow heavier and warier in the deeper lies. This is a river you fish on your feet, hopping from pocket to pocket, reading where the broken water sets a feeding lane and dropping a fly into it before the current spits it out. The early season belongs to snowmelt, which runs it cold and pushy until things settle. Once the flows drop into summer shape, the caddis come off well and the terrestrials start falling, and a buoyant dry with a nymph hung beneath it covers most of what the river asks. Beautiful, demanding, rewarding water — and a wade that asks for respect.

  • River
  • Mixed
The full read · show the working · for Brown Trout · confidence 90%
How the 82 is built — score × weight = contribution
Temperature91 × 28%25.5
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time65 × 13%8.5
Pressure80 × 7%5.6
Insect activity62 × 12%7.4
Conditions total= 82
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.
Related guides
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