Spring Creek · Limestone · Wisconsin, US

Blue River

A calm, tree-lined stretch of the Blue River flowing through the driftless area of Grant County, Wisconsin.

A bigger Driftless river with a wilder feel than the manicured coulee creeks, holding wild browns and stocked rainbows through limestone bluff country.

Tomorrow · Not the day for it
Scud
Forecast · Tomorrow
Not the day for it
Not much stacked in your favour today. Worth an hour if you are nearby, not worth the special trip.
45% projected
Today's fly
Scud
Scud
Conditions on the water · Tomorrow
Proxy gauge
Level
Rising
Proxy
via West Fork Kickapoo River
Water temp17.9°C
ClarityUnfishable
Weather26°C
WindN 16 km/h
Pressure1013 hPa
Rain · recent0.8 mm
Rain · ahead16.5 mm

No gauge on this water — conditions are inferred from West Fork Kickapoo River. The trend transfers, the absolute level does not.

Water temperature for Rainbow Trout
Ideal
18°C est.ideal 10–18°C
0°14°28°
How to fish it · for Rainbow 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 temperature is right today, though insect activity could be better.
Likely species
Mayflies
Caddisflies
terrestrials
Hatch timeline · tomorrowPeak at 7am

12pm(now) — Grasshopper (Eastern)

Stage: Terrestrials on topApproach: Dry flyActivity: 51%
Also:Trico (Eastern)37%Reed Smut30%
Peak emergence windowWeather boostEmergence building5 food groups active

Peak activity at 7am — Trico (Eastern) (Trico (Eastern), Weather boost)

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 4 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
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
Rainbow Trout fly box
Local fly shops: Driftless Angler
Permits & access
Permit required — see local rules.
  • WI DNR — verify reach regulations.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Castle Rock Creek
22 km
Brown trout
Big Green River
32 km
Brown trout · Rainbow trout
Willow Creek
32 km
Brown trout · Brook trout
Tainter Creek
46 km
Brown trout · Brook trout
West Fork Kickapoo River
55 km
Brown trout · Brook trout
Gallery · 2
  1. A calm, tree-lined stretch of the Blue River flowing through the driftless area of Grant County, Wisconsin.
    Blue River
  2. Terrain map of the venue
    Terrain map
About this water

A bigger Driftless river with a wilder feel than the manicured coulee creeks, holding wild browns and stocked rainbows through limestone bluff country. It runs a touch warmer and freer-stoned than the spring seeps, so it fishes more like a small freestone with a spring-creek heart.

  • Limestone
Water quality · US Clean Water Act
  • Aquatic life: Supporting
What this classification means

EPA ATTAINS assessment unit 'Blue River' (WI10006007), 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) · WI10006007

The full read · show the working · for Rainbow Trout · confidence 90%
How the 82 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time65 × 13%8.5
Pressure75 × 7%5.3
Insect activity64 × 12%7.7
Conditions total= 82
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via West Fork Kickapoo Riverproxy
Prey activitymodelled from regional profilemodelled
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout First Saturday in January (early catch-and-release, artificial only) → October 15 (regular harvest season from first Saturday in May)
Related guides
Euro Nymphingsubsurface methods
Booking & contacts