Green River Fly Fishing Guide & Flaming Gorge Dam Water Flow Report

Coverage: May 11-17, 2026

1. Overview

This week begins with elevated but rapidly dropping flows as Flaming Gorge Dam reduces releases following the Razorback Sucker larval peak.

By May 14, flows are expected to stabilize near 1,100 CFS, creating the best conditions of the week for wading, nymphing, dry-fly fishing, and mixed-method angling.

Weekly Outlook:

Early Week (Mon–Wed): High, cold, fast water with limited wading access
Late Week (Thu–Sun): Stable flows, improved clarity, stronger hatches, and excellent fishing opportunities

Water temperatures remain cold throughout the period, but improved visibility and stable releases later in the week should significantly improve fishing quality.

2. Dam Operations & Water Releases

Verified Sources: U.S. Bureau of Reclamation (BOR), USGS, Colorado Basin River Forecast Center (CBRFC)

2.1 Release Schedule

May 11–14: Controlled reduction from peak releases (~8,600 CFS) toward ~1,100 CFS
May 14–17: Stable releases averaging approximately 1,100 CFS
Reservoir Elevation: ~6,020 ft
Storage Level: Approximately 79% live storage
Hydrology: Inflows remain significantly below average; DROA drought-response operations remain in effect

2.2 What This Means for Guests

Monday–Wednesday

High, pushy, cold water
Best suited for drift boats
Limited safe wading opportunities

Thursday–Sunday

Moderate, stable flows
Excellent wading access
Most consistent fishing of the week

3. Safety & River Conditions

Verified Sources: BOR Safety Notices, USGS Gauge Guidance

3.1 Cold Water Conditions

Tailwater temperatures remain extremely cold.

Important: Cold-shock risk remains elevated, especially during high-release periods.

3.2 Swift Current Hazards

Early-week flows create:

Undercut banks
Deep edges
Unstable footing
Fast main-channel velocity

Extreme caution is advised.

3.3 Personal Flotation Devices (PFDs)

Required for all boaters
Strongly recommended for bank anglers during high flows

3.4 Daily Flow Monitoring

Guests should check river conditions daily before fishing or floating:

USGS Gauge 09234500 – Green River below Flaming Gorge Dam
BOR Hourly Release Schedule

3.5 Section-Specific Hazards

B Section (Little Hole to Browns Park)

High flows create:

Hazardous bridge approaches
Tight bends
Limited recovery water

Always confirm current conditions with local guides before floating.

4. Fishing Conditions by River Section

4.1 A Section (Dam → Little Hole)

Monday–Wednesday (High / Dropping Flows)

Conditions favor boat anglers.

Fish will hold in:

Soft edges
Deep buckets
Seam transitions
Protected slower current zones

Best Techniques:

Deep nymphing
Heavy streamer presentations

Thursday–Sunday (~1,100 CFS)

Classic Green River tailwater conditions return.

Improved wading around:

Riffle/run complexes
Side seams
Mid-depth structure

Expected Activity:

- Strong midge fishing
- Reliable BWO dry-fly windows
- Better dry-dropper opportunities

4.2 B Section (Little Hole → Browns Park)

Early Week

More technical rowing required.

Challenges include:

Limited eddy structure
Pushy bank currents
Fast transitions

Late Week

Conditions improve significantly.

Fish should concentrate near:

Mid-depth shelves
Ledges
Eddy drop-offs

Best Methods:

Streamers
Larger nymph rigs

4.3 C Section (Browns Park → Colorado Line)

This stretch will be most affected by visibility fluctuations from early-week releases.

As flows stabilize:

Clarity improves
Streamer fishing becomes highly productive
Lower fishing pressure makes this a strong option for experienced boaters

5. Hatches & Food Sources

Verified Regional Green River May Patterns

5.1 Active Hatches

Midges (#20–24)

Active throughout the day
Best in softer water and slower seams

Blue-Winged Olives (BWO) (#18–22)

Strongest during cloudy weather
Late morning through afternoon

Pale Morning Duns (PMDs) (#16–20)

Beginning to increase this week

Early Caddis (#16–20)

Light emergence currently
Better evening activity in back eddies

5.2 Year-Round Tailwater Staples

Always productive:

Olive scuds
Tan scuds
Sowbugs
Annelids / San Juan Worms
Small olive mayfly nymphs
Brown mayfly nymphs

6. Recommended Tactics & Fly Selection

6.1 High / Dropping Flows (Monday–Wednesday)

Best Approach:
Deep nymph rigs with extra weight.

Target:

Inside bends
Soft seams
Deep buckets
Current breaks

Recommended Flies:

Zebra Midge (Black/Red) #20–22
BWO Nymphs #18–22
Perdigons #14–18
Rainbow Warriors #16–18

Streamers:

Sculpin patterns
Sparkle Minnow
Dungeon patterns
- Olive
- Black
- White

6.2 Stable Moderate Flows (~1,100 CFS, Thursday–Sunday)

Best Tactics:

Two-fly nymph rigs
Dry-dropper setups
Streamers during low light

Suggested Rig:
Scud/Worm + Small BWO or Midge Dropper

Dry Flies:

BWO Parachutes #18–22
Midge Clusters #20–24

7. Weekly Planning Guidance

Best Fishing Window

Thursday–Sunday (May 14–17)

The prime fishing window of the week.

Why:

Stable ~1,100 CFS flows
Best wading access
Improved visibility
Strongest hatch activity
Best dry-fly potential

Drift Boat Focus

Monday–Wednesday (May 11–13)

Expect:

High cold water
Fast currents
Limited safe wading

Best suited for guided drift boat anglers.

Safety Reminders — ALWAYS PRACTICE SAFETY FIRST

Before launching:
✔ Check same-day CFS levels
✔ Wear a PFD
✔ Dress for cold water immersion
✔ Avoid undercut banks during high water
✔ Confirm local conditions before floating

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