Spring Creek · Limestone · Wisconsin

Timber Coulee Creek

Timber Coulee Creek terrain map

The most famous water in the Driftless and, by reputation, one of the densest trout streams in the country — something like four hundred pounds of brown trout to the acre, which is a number that sounds made up until you fish it.

Poor · Brown Trout
Pink Squirrel · 14-16
Poorlive now
Not the day for it
River temperature is the limiting factor today, not the flow. This is not the day to push it. Check the thermal advice above before you head out.
90% confidence
What moved it
  • LevelDry recentlyNo gauge reading
  • Water temp22.1°C
  • ClarityClear
Today's fly
Pink Squirrel
Pink Squirrel14-16
High-confidence seasonal pick
Conditions on the water
Estimate
Level
Dry recently
No gauge reading
Water temp22.1°C
ClarityClear
Weather25°C
WindSW 15 km/h
Pressure1012 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

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

Water temperature for Brown Trout
Warm — slow
22°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
Water at 22.1°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 2 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 4 with Pro.

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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
Trout seasonSeason
1
2
2
2
1
SulphurHatch
2
3
2
Trico (Eastern)Hatch
2
3
3
2
Eastern Blue-Winged OliveHatch
2
3
3
3
3
3
3
3
2
Eastern Summer BWO (Drunella)Hatch
2
3
3
2

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

Ranked for today
Brown Trout fly box
SU
Sulphur
16-18 · Pattern
Proven pattern for this period
Local fly shops: Driftless Angler
Permits & access
Permit required — see local rules.
  • WI DNR — stretches of the Coon Creek watershed carry special artificial-only/C&R regs; verify by reach.
What's coming
Plan ahead
5-day outlook
Water here around 22°C. Nothing cooler within range — carry a thermometer.
About this water

The most famous water in the Driftless and, by reputation, one of the densest trout streams in the country — something like four hundred pounds of brown trout to the acre, which is a number that sounds made up until you fish it. A restored limestone spring creek that runs cold and clear through a narrow coulee, so the trout see everything and forgive nothing. Fish it light and humble.

Under the surface

Timber Coulee is the heart of the Driftless — that strange, lovely pocket of southwest Wisconsin the glaciers somehow missed, leaving a country of steep wooded ridges and spring-fed limestone valleys where the coldwater creeks run clear and the wild brown trout are thick as anywhere in America. It's a small spring creek winding through a hayfield-and-woodlot coulee, cold and fertile off the limestone aquifer, the subject of decades of habitat work that turned a degraded ditch into a model wild-trout stream. The bed is gravel and silt over limestone, the banks rebuilt with lunker structure and undercut sod, the water clear and bug-rich. Wading is easy on firm gravel, the casting tight against the brush and the grass. Timber Coulee is proof of what spring water and patient restoration can do, and on a good evening with the trout rising along the cut banks, it is as good as small-stream fishing gets.

Wading: Tight brushy casting, soft silt pockets

  • Limestone
  • Unconfined
  • Spring creek
  • Pool riffle
Water quality · US Clean Water Act
  • Aquatic lifeSupporting
What this classification means

EPA ATTAINS assessment unit 'Timber Coulee Creek' (WI10025116), 2024 Integrated Report. Aquatic Life use: Fully Supporting. 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) · WI10025116

The full read · show the working · for Brown Trout · confidence 90%
How the 12 is built — score × weight = contribution
Temperature6 × 28%1.7
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity61 × 12%7.3
Limiting factor: Water temperature (22.1°C) is outside Brown Trout's preferred range (10–16°C)= 55
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
  • TroutFirst Saturday in January (early catch-and-release, artificial only)October 15 (regular harvest season from first Saturday in May)
Related guides
Booking & contacts