Spring Creek · Limestone · Minnesota, US

Garvin Brook

Garvin Brook venue image

A Winona County brook holding wild browns and brookies, with the water above Stockton Dam mattering most for the cold temperatures that keep trout happy.

Good · Rainbow Trout
Trico Spinner · 20-24
Goodlive now
A proper day on the water
Low and clear — careful approach country. Stay small, stay accurate.
90% confidence
What moved it
  • LevelDry recentlyNo gauge reading
  • Water temp16.9°C
  • ClarityClear
Today's fly
Trico Spinner
Trico Spinner20-24
Proven pattern for this period
Conditions on the water
Estimate
Level
Dry recently
No gauge reading
Water temp16.9°C
ClarityClear
Weather24°C
WindSW 3 km/h
Pressure1014 hPa
Rain · recent0.0 mm
Rain · ahead6.8 mm

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

Water temperature for Rainbow Trout
Ideal
17°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
Good — water temperature is right today, though insect activity could be better.
Likely species
Mayflies
Caddisflies
terrestrials
Hatch timeline · todayPeak at 11am

Hatch predictions

Today's headline hatch shown — see all 5 active hatches hour by hour with Pro.

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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
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 Fly Fishing Co.
Permits & access
Permit required — see local rules.
  • MN DNR — verify season dates and regulations.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Whitewater River
23 km
82
Brown trout · Brook trout · Rainbow trout
Rush Creek
24 km
Brown trout · Brook trout
Duschee Creek
39 km
Brown trout
Trout Run Creek
44 km
Brown trout
West Beaver Creek
44 km
Brown trout · Brook trout
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

A Winona County brook holding wild browns and brookies, with the water above Stockton Dam mattering most for the cold temperatures that keep trout happy. Stocking up top was stopped decades ago and the wild fish have only got better for it.

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

Recreation: Bacteria/pathogen advisory — mind wading cuts and immersion.

EPA ATTAINS assessment unit 'Garvin Brook' (MN07040003-542), 2024 Integrated Report. Aquatic Life use: Not Supporting. Listed impairment causes: Turbidity, Pathogens. 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) · MN07040003-542

The full read · show the working · for Rainbow Trout · confidence 90%
How the 77 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow60 × 22%13.2
Clarity85 × 18%15.3
Feeding Time65 × 13%8.5
Pressure75 × 7%5.3
Insect activity57 × 12%6.8
Conditions total= 77
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.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout January 1 (winter catch-and-release) → September 30 (harvest from mid-April)
Related guides
Euro Nymphingsubsurface methods
Booking & contacts