Green River Fishing Report
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Prepared for Dutch John Resort
Green River Fly Fishing Guide Report
Flaming Gorge Dam water flow and release update with this week's temps, hatch windows, and section-by-section tactics for the Green River.
Sunday August 24 – Saturday August 30, 2026
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This Week on the Green
Flows hold steady between 1,500 and 1,700 CFS with cold, clear tailwater and a full late-summer hatch menu. PMDs dominate mornings and evenings, terrestrials own the midday heat, and caddis close out the day in the shade.
Below is the current dam release status, water temperature and clarity, hatch timing, our recommended fly box, and a full tactical breakdown of Sections A, B, and C. Floating remains the most productive way to cover water and reach active feeding lanes throughout the week.
1,500–1,700 CFS
Dam Discharge
58–60°F
Water Temp
8–15 ft
Clarity
Float-Focused
Best Approach
Section 01
Dam Release Summary
Dam Discharge
1,500–1,700 CFS throughout the week. Hourly fluctuations continue due to power generation but remain predictable.
Reservoir Elevation
6,012–6,013 ft with stable late-summer drawdown.
Float Conditions
Consistent drift lanes support both float and wade anglers. Floating remains most effective for maximum coverage.
Section 02 and 03
Water Temperature, Clarity and River Conditions
Water Temperature
58–60°F — a strong range for trout feeding activity.
- Morning PMDs and evening caddis producing well
- Midday terrestrials dominant in warm, windy conditions
Clarity
8–15 ft visibility — high clarity typical for late August.
River Conditions
- River seams well-defined and stable
- Afternoon winds may affect dry-fly drift and boat control
- Wading possible in lower-flow pockets
- Floating remains most effective
Section 04
Hatch Overview
Match size to window and you will find active fish throughout the day.
| Hatch | Size | Window / Conditions |
|---|---|---|
| PMDs | #16–20 | Strong mornings and evenings |
| Caddis | #18–20 | Excellent during evening shade |
| Midges | #20–22 | Active early and midday |
| Terrestrials | #12–16 | Dominant warm, windy afternoons |
| Yellow Sallies | #14–16 | Light activity |
| BWOs | #20–22 | During overcast conditions |
Section 05
Recommended Fly Patterns
Nymphs
- Split Case PMD #20
- Stealth PMD #20
- Sowbug #10
- Wiggly Worm #8
- Blowtorch #22–24
Dry Flies
- Corn-Fed Caddis #20
- PMD Emergers #16–20
- Bionic Ant #16
- Parachute Adams #18–20
Terrestrials
- Bionic Ant #16
- Beetle #14
- Hopper patterns #10–12
Streamers
- Sparkle Minnow #6
- Thin Mint #8
- Articulated sculpin patterns
Section 06
Section by Section Outlook
Tactical notes for Sections A, B, and C covering techniques, best patterns, and what to expect on the water this week.
Section A → Dam to Little Hole
Dam to Little Hole
Morning PMD emergers and consistent seam nymphing set up strong evening caddis windows.
Conditions
- Morning PMD emergers produce consistent surface takes
- Nymph rigs with PMD and sowbug combinations perform well in seams
- Midday terrestrials draw strikes along grassy banks
- Evening caddis activity is strong
- Streamer fishing improves in shaded pockets
Top Patterns
- PMD Emergers #16–20
- Split Case PMD #20
- Sowbug #10
- Corn-Fed Caddis #20
- Hopper patterns #10–12
- Sparkle Minnow #6
Section B → Little Hole to Browns Park
Little Hole to Browns Park
Deep mid-river slots, undercut banks, and hopper-dropper rigs are the story here.
Conditions
- Deep nymphing effective in mid-river slots
- Caddis dries perform well during evening shade
- Hopper-dropper rigs excel during windy afternoons
- Undercut banks support productive streamer runs
Top Patterns
- Blowtorch #22–24
- Wiggly Worm #8
- Corn-Fed Caddis #20
- Hopper patterns #10–12
- Beetle #14
- Thin Mint #8
Section C → Browns Park to Colorado Line
Browns Park to the Colorado Line
Broad flats built for long terrestrial drifts and productive evening streamer swings.
Conditions
- Slow-water nymphing remains reliable
- Long terrestrial drifts produce steady action
- Evening streamer swings productive in broad flats
- PMD spinners appear during calm evening periods
Top Patterns
- Stealth PMD #20
- Bionic Ant #16
- Parachute Adams #18–20
- Articulated sculpin patterns
- Sowbug #10
Section 07
Safety and Operational Notes
Swift FlowsFlows remain swift at current discharge levels. Exercise caution in all wading situations.
Cold WaterWater remains cold enough to pose a hypothermia risk with prolonged exposure.
Afternoon WindAfternoon winds may challenge boat handling and affect dry-fly presentations.
PFDs RequiredPersonal flotation devices are required for all float anglers. PFDs provided at no extra charge for in-boat guests.
Section 08
Week Summary — August 24 to 30, 2026
| Flows | 1,500–1,700 CFS |
| Water Temperature | 58–60°F |
| Clarity | High — 8–15 ft visibility |
| Best Tactics | PMD dries, heavy nymphs, evening caddis, midday terrestrials |
| Best Windows | 7–10 AM (PMDs), 11 AM–2 PM (terrestrials), 6–8 PM (caddis and spinners) |
| Recommended Approach | Float-focused for maximum productivity |
Best Windows to Fish
7–10 AM
PMDs
11 AM–2 PM
Terrestrials
6–8 PM
Caddis and PMD spinners
Green River fly fishing report prepared for Dutch John Resort, Flaming Gorge, Utah. Conditions for August 24 to 30, 2026.