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Green River Fishing Report

Prepared for Dutch John Resort

Green River Fly Fishing Report and Flaming Gorge Dam Water Flow Update (Sept 22–28, 2026)

Elevated dam releases, a cooling trend, and strong midday BWOs. Here is this week’s flow data, section-by-section water temps, hatch windows, and tactics for the Green River.

Tuesday September 22 – Monday September 28, 2026
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Green River Fly Fishing Report and Flaming Gorge Dam Water Flow Update (Sept 22–28, 2026)
This Week on the Green

Flows remained elevated between 2,166 and 2,180 CFS all week, and a cooling trend improved trout feeding consistency. BWOs were strong midday, Tricos showed in the mornings, and midges stayed active all day.

Below is the current dam release status, water temperatures by section, hatch timing, our recommended fly box, and a tactical breakdown of Sections A, B, and C. Drift boats remain the most productive way to cover water and reach active feeding lanes at these flows.

Green River Fly Fishing Report and Flaming Gorge Dam Water Flow Update (Sept 22–28, 2026)
2,166–2,180 CFS
Dam Discharge
58–64°F
Water Temp
High
Clarity
Drift Boat
Best Approach
Section 01

Dam Release Summary

Dam Discharge
2,166–2,180 CFS throughout the week. Hourly fluctuations continued due to power generation but remained predictable.
Reservoir Elevation
Held near 6,008–6,009 ft.
Float Conditions
Elevated flows create excellent seams for drift boats. Wading is limited in the upper river, so a drift-boat approach is the most productive way to fish this week.
Section 02 and 03

Water Temperature, Clarity and River Conditions

Water Temperature
58–64°F, depending on section.
  • Dam Outflow: 58–59°F
  • Section A: 58–60°F
  • Section B: 60–62°F
  • Section C: 62–64°F
Clarity
High, with gin-clear water in the upper river.
River Conditions
  • Cooling trend improved trout feeding consistency
  • Midday BWO activity strengthened
  • Afternoon winds challenged boat handling
  • Drift-boat fishing remains most effective
Huge Brown Trout Ready To Be Release Safely Back Into His Home.
Section 04

Hatch Overview

Match size to window and you will find active fish throughout the day.

HatchSizeWindow / Conditions
BWOs#18–22Strong midday
Tricos#20–24Present in mornings
Midges#20–22Active all day
Terrestrials#12–16Productive along grassy banks

Book a Guided Float This Week

Our guides know how to fish these elevated flows and will put you on the right seam at the right hour. See open dates and reserve your trip on the Green.

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Section 05

Recommended Fly Patterns

Nymphs

  • RS2 #18–20
  • Split Case PMD #20
  • Zebra Midge #22–24
  • Sowbug #10

Dry Flies

  • Sparkle Dun #18–20
  • PMD Emergers #16–20
  • Parachute Adams #18–20

Terrestrials

  • Hoppers #10–12
  • Bionic Ant #16
  • Beetle #14

Streamers

  • Sculpins
  • Dungeons
  • Thin Mint #8
Green River Fly Fishing Report and Flaming Gorge Dam Water Flow Update (Sept 22–28, 2026)
Green River Fly Fishing Report and Flaming Gorge Dam Water Flow Update (Sept 22–28, 2026)
Green River Fly Fishing Report and Flaming Gorge Dam Water Flow Update (Sept 22–28, 2026)
Section 06

Section by Section Outlook

Tactical notes for Sections A, B, and C covering water temps, techniques, and what to expect on the water this week.

Section A
→
Dam to Little Hole

Dam to Little Hole

Gin-clear water and a fast push. Midday BWOs are the main event.
Conditions
  • Water temps 58–60°F
  • Gin-clear with a fast push
  • Wading limited at current flows
  • Midday BWOs strong
  • Long leaders and fine tippet essential
Top Patterns
  • RS2 #18–20
  • Sparkle Dun #18–20
  • Parachute Adams #18–20
  • Zebra Midge #22–24
Section B
→
Little Hole to Indian Crossing

Little Hole to Indian Crossing

Excellent seams during elevated flows, with larger fish than Section A.
Conditions
  • Water temps 60–62°F
  • Excellent seams during elevated flows
  • Hopper-dropper rigs strong
  • Larger fish than Section A
Top Patterns
  • Hoppers #10–12
  • Split Case PMD #20
  • Sowbug #10
  • Bionic Ant #16
Section C
→
Indian Crossing to Colorado Line

Indian Crossing to the Colorado Line

The warmest water on the river, with trophy browns on the move.
Conditions
  • Water temps 62–64°F
  • Warmest water on the river
  • Trophy browns active
  • Streamers productive during evening low-flow windows
Top Patterns
  • Sculpins
  • Dungeons
  • Thin Mint #8
  • Beetle #14
Green River Fly Fishing Report and Flaming Gorge Dam Water Flow Update (Sept 22–28, 2026)
Hobie craft pictures Kayaking 2
Section 07

Safety and Operational Notes

Swift Flows
Flows remained swift at current discharge levels. Use caution in all wading situations.
Cold Water
Cold water increased hypothermia risk with prolonged exposure.
Afternoon Wind
Afternoon winds challenged boat handling and dry-fly presentations.
PFDs Required
Personal flotation devices are required for all float anglers.
Green River Fly Fishing Report and Flaming Gorge Dam Water Flow Update (Sept 22–28, 2026)
Section 08

Week Summary: September 22 to 28, 2026

Flows2,166–2,180 CFS
Water Temperature58–64°F (section-dependent)
ClarityHigh
Best TacticsBWOs midday, heavy nymphs, evening streamers, terrestrials mid-afternoon
Best Windows10 AM–2 PM (BWOs), dusk (streamers)
Recommended ApproachDrift-boat focused for maximum productivity

Best Windows to Fish

Mornings
Tricos
10 AM–2 PM
BWOs
Mid-Afternoon
Terrestrials
Dusk
Streamers

Ready to Fish the Green River?

Fall fishing is picking up as the water cools. Lock in a guided trip with the Dutch John Resort team and put these tactics to work on the water.

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Green River fly fishing report prepared for Dutch John Resort, Flaming Gorge, Utah. Conditions for September 22 to 28, 2026.