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Green River Fishing & Operations Report

Jun 9, 2026 | Green River Fly Fishing Guide Reports and Flaming Gorge Water Dam Flow Release

Prepared for: Dutch John Resort Operations

Executive Summary

  • June 8–11: Releases increase to approximately 4,600 cfs for the Smallmouth Bass flow experiment.
  • June 11: Ramp-down begins; hourly fluctuations continue for power generation.
  • June 13–14: Flows expected to stabilize between 2,300–2,600 cfs.
  • Reservoir Elevation (June 3): 6,017.50 ft (77% of live storage).
  • Water clarity remains high; temperatures will cool slightly during peak releases.
  • High flows June 8–11 may reduce wade-only bookings; float trips remain optimal.
  • Cicada and terrestrial activity is expected to increase mid-week and support weekend bookings.

Water Temperatures & River Conditions

Water Temperatures

  • 52°F recorded June 3.
  • 54.1°F recorded June 6 near Greendale.
  • Selective Withdrawal Structure (SWS) will release colder water June 8–11.

Section A

  • Pre-experiment flows: 963–1,250 cfs
  • Excellent water clarity.
  • June 8–11: High, fast, cold water with limited wading opportunities.
  • Primary hatches:
    • PMDs
    • Midges
    • Light BWOs

Section B

  • Strong terrestrial and cicada activity.
  • Elevated flows favor float fishing and provide full Green River access to prime trout holding water.
  • PMDs and caddis activity building.

Section C

  • Slightly off-color at times.
  • Excellent cicada and terrestrial action.
  • Streamers effective along undercut banks.

Hatch Activity & Fly Recommendations

Hatch Forecast

Hatch Size Activity
Midges #20–22 High activity all week
PMDs #18–20 Moderate to high; best 8–11 a.m. and 5–7 p.m.
Caddis #18–20 Moderate and building
Cicadas #8–10 Active; strongest on Sections B & C
Terrestrials #12–16 Strong midday window
BWOs #18–22 Low to moderate; strongest on cloudy afternoons

Recommended Fly Patterns

Dry Flies

  • Bionic Ant #12–16
  • Card’s Cicada #10
  • Lovejoy Cicada #10
  • PMD Parachute #18–20
  • Parachute Ant #16–22
  • Unsinkable #10
  • Triple Double #14–18
  • Parachute BWO #20–22

Nymphs

  • Tungsten Split Case PMD #20
  • Pheasant Tail Tungsten #20
  • Olsen’s Hare’s Ear Blowtorch #20–28
  • Black Zebra Midge #20–22
  • Perdigon #14–20
  • Tailwater Sowbug #16–20
  • RS2 #22–24
  • Frenchie #14–18

Streamers

  • Gallop’s Mini-Flatlander
  • Baby Gonga (Tan)
  • Cheech Leech
  • Tungsten Jig Bugger
  • Coffey’s Sparkle Minnow Sculpin #6
  • Dungeon #4–8
  • Woolly Bugger #6–10

Guest & Operational Alerts

June 8–11 Safety Advisory

  • High flows and cold water create hazardous wading conditions.
  • Expect rapid flow fluctuations due to power generation.
  • Recommend all guests wear PFDs during float trips.
  • Advise guests to avoid mid-river gravel bars during peak flows.
  • Increased afternoon wind potential.
  • Best fishing windows remain:
    • Early morning
    • Evening hours

Guide Notes & Staff Action Items

Guide Notes

  • Focus on inside bends, soft edges, and deeper seams during high flows.
  • Use tungsten nymphs and longer leaders for improved depth control.
  • Recommended dry-dropper setup:
    • Cicada or ant dry fly
    • Zebra Midge or RS2 dropper
  • Streamers:
    • Slow strips along banks
    • Adjust color based on light conditions
  • Cicada activity continues to strengthen—prepare fly boxes accordingly.

Staff Action Items

  • Update guests on daily flow changes during check-in.
  • Ensure shuttle drivers are briefed on high-flow safety protocols.
  • Stock the fly shop with:
    • Cicadas
    • PMDs
    • Midges
    • Tungsten nymphs
  • Confirm guides are providing updated high-flow safety briefings.

Week-Ahead Outlook (June 15–21)

  • Improved wading conditions expected as flows stabilize following the experiment.
  • PMD and caddis hatches should continue to strengthen.
  • Cicada activity is likely to peak during mid-June.
  • Water temperatures should rebound slightly as SWS adjustments normalize.