Freestone · Mixed · Wyoming

Green River

A wide, calm stretch of the Green River bordered by grassy banks under a dramatic stormy sky in Wyoming.

The upper Green above Warren Bridge is high, open, sagebrush-flat freestone water with the Wind River Range standing off to the east, and it's a long way from the famous tailwater Green down in Utah.

Poor · Rainbow Trout
Parachute Adams · 12-18
Poorlive now
Not the day for it
River steady at a fishable height. Not much stacked in your favour today. Worth an hour if you are nearby, not worth the special trip.
90% confidence
What moved it
  • Level0.80 mLast reading 6h ago
  • Water temp22.2°C
  • ClarityClear
Today's fly
Parachute Adams
Parachute Adams12-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.80 m
Last reading 6h ago
Water temp22.2°C
ClarityClear
Weather25°C
WindW 9 km/h
Pressure1015 hPa
Rain · recent1.8 mm
Rain · ahead0.0 mm

Live readings — water temperature is an estimate where the gauge does not record it.

Water temperature for Rainbow Trout
Warm — slow
22°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
Water at 22.2°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Hatch timeline · todayQuiet day

Hatch predictions

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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 2 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
2
2
1
1
2
2
2
2
2
2
2
2
Western Green DrakeHatch
2
2
Flav (Small Western Green Drake)Hatch
2
3
2
Mahogany DunHatch
2
2
American March BrownHatch
2
3
2

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

Ranked for today
Rainbow Trout fly box
Permits & access
Permit required — see local rules.
  • Wyoming licence
  • Flies-and-lures-only from Warren Bridge to Wood's Bridge; good BLM wade access — check Wyoming Game & Fish.
What's coming
Plan ahead
5-day outlook
Water here around 22°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
  1. A wide, calm stretch of the Green River bordered by grassy banks under a dramatic stormy sky in Wyoming.
    Green River at Seedskadee National Wildlife Refuge Wyoming
  2. Terrain map of the venue
    Terrain map
About this water

The upper Green above Warren Bridge is high, open, sagebrush-flat freestone water with the Wind River Range standing off to the east, and it's a long way from the famous tailwater Green down in Utah. Browns, rainbows, and mountain whitefish hold in the riffles and runs, and there's good BLM wade access through the Warren Bridge stretch where it's flies-and-lures-only. It runs high and off-color in June snowmelt, then settles into wadeable summer flows. Big, quiet country and willing fish — the kind of place you fish slow because there's no reason to hurry.

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

EPA ATTAINS assessment unit 'Green River' (WYGR140401010200_01), 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) · WYGR140401010200_01

The full read · show the working · for Rainbow Trout · confidence 90%
How the 15 is built — score × weight = contribution
Temperature9 × 28%2.5
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time70 × 13%9.1
Pressure75 × 7%5.3
Insect activity59 × 12%7.1
Limiting factor: Water temperature (22.2°C) is outside Rainbow Trout's preferred range (10–18°C)= 57
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 10–18 °C ideal band — would lift the score and ease welfare.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout1 April → 31 March
Related guides
Euro Nymphingsubsurface methods
Booking & contacts