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
Book a Green River Fly Fishing Guide
For more detailed Green River fly fishing guide availability: