Spring Creek · Mixed · Idaho, US

Silver Creek

Silver Creek terrain map

Silver Creek is the spring creek that humbles everybody.

Today · About as good as it gets
Pink Shrimp
Forecast · Today
About as good as it gets
On the feed top to bottom — start on the rises with a dry, drop a nymph if they stay down.
90% projected
Today's fly
Pink Shrimp
Pink Shrimp
Conditions on the water · Today
Live gauge
Level
Steady
2.04 m
Water temp13.1°C
ClarityClear
Weather18°C
WindN 21 km/h
Pressure1007 hPa
Rain · recent0.0 mm
Rain · ahead0.0 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
13°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 — conditions well-balanced, with water temperature particularly in your favour.
Likely species
Hatch timeline · todayPeak at 12pm

12pm(now) Mahogany Dun

Stage: On emergersApproach: Emerger or dryActivity: 67%
Also:Reed Smut61%
Peak emergence window6 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

Top prey shown — see all 2 with Pro.

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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
Western Blue-Winged OliveHatch
2
3
3
3
3
3
3
3
2
Pale Morning DunHatch
2
3
3
2
TricoHatch
2
3
2
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2

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

Ranked for today
Brown Trout fly box
Permits & access
Permit required — see local rules.
  • Idaho licence
  • The Nature Conservancy Preserve is barbless catch-and-release — verify the special regulations before fishing.
What's coming
Plan ahead
5-day outlook
About this water

Silver Creek is the spring creek that humbles everybody. It's a slow, glassy, weed-lined desert spring near Picabo, protected by the Nature Conservancy, holding big wild rainbows and browns that have seen every fly ever tied and will refuse yours with what feels like contempt. The trico and baetis hatches bring fish up in pods, and you'll watch a dozen noses working while your perfect drift goes ignored. It's flat-water, fine-tippet, on-your-knees fishing. Hemingway loved it. You'll either love it or it'll break you, and both are the right reaction.

Under the surface

Silver Creek rises from springs in the high desert near Picabo and runs as one of the most demanding spring creeks on earth — a slow, clear, weed-choked meander across a sage flat under the Pioneer Mountains, where the trout grow large on a relentless conveyor of insects and learn, very quickly, exactly what a real mayfly looks like. Hemingway fished here, and the water hasn't gotten any easier since. The flow is constant and cold, drawn from the ground rather than the sky; the bed is silt and rooted weed, the surface a sheet of glass that telegraphs every clumsy cast. The character is meadow spring creek at its most refined — no riffles to hide your mistakes, no current to drag drag out of your drift. Wading is a delicate, often discouraged business on a soft bottom; mostly you stay out and cast long.

Wading: Soft silt bottom, glassy exposure

  • Mixed
  • Unconfined
  • Pool riffle
  • Meandering
Water quality · US Clean Water Act
  • Aquatic lifeImpaired
What this classification means

EPA ATTAINS assessment unit 'Silver Creek - source to mouth' (ID17040221SK023_03), 2022 Integrated Report. Aquatic Life use: Not Supporting. Listed impairment causes: Temperature, Cause Unknown Impaired Biota. This is a Clean Water Act assessment-unit classification (the US analogue of WFD), not a live reading.

Status is for the Clean Water Act assessment unit covering this reach.

EPA ATTAINS (Clean Water Act) · ID17040221SK023_03

The full read · show the working · for Brown Trout · confidence 90%
How the 86 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time75 × 13%9.8
Pressure80 × 7%5.6
Insect activity66 × 12%7.9
Conditions total= 86
Can you trust it?
Water temperaturelive gauge readinggauge
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Seasons & zones
  • Trout Saturday of Memorial Day weekend30 November
Related guides
Booking & contacts