Green River Fly Fishing Report
April 8th, 2025
The fishing has been very consistent with solid numbers of fish being caught. There is a steady stream of insect activity. BWO (Blue-Winged Olive) mayflies are prominent, especially during late mornings and early afternoons on overcast days. Midges remain a reliable go-to, especially during the cooler morning hours. Caddis are starting to show up sporadically, making them another enticing option during warmer portions of the day..
The flows on the Green River are now averaging 1,250cfs and fluctuating between 920cfs and 2,350 cfs daily. Current snow-pack for the Green River is at about 107% of normal in the upper Green River Drainage and 106% of normal in the lower valley. Flaming Gorge Reservoir is at about 85% capacity. Hopefully we get a few big storms to get the snow-pack to around 150% of normal for better flows this summer.
1,250 CFS average
920 - 2,350 daily
39-41 F
CLEAR
Subject to daily change.
Fluctuating Low Flows
A Section: The lower half of A has been pretty consistent with streamers. The Midge hatch begins in the mornings around 10am. On calm days there are pods of trout up on these tiny bugs. The fish are holding in their winter runs, nymph rigs around 9 feet deep have been best. The strikes are very subtle, so swing on any movement.
B Section: There have been a few caddis around Nymph rigs and streamers have been the most effective method on the B Section. Commit to streamers on lower B.
C Section: The action has been decent on streamers. Fish dark flies on dark days and tan, ginger or white on bright days. Dry fly action is little to none.
Hatches:
- Mayflies: (BWO's) Size 18-22
- Midges: Size 20-24
- Caddis: Size 16-18 - limited numbers / sporadic on the lower river
Dry Flies
Calm, cloudy, or wet days will fish the best for the dry fly. When the sun is out the fish tend to be much more shy on the dry. Higher flows and warmer water temperatures would definitively help bring more fish to the surface. Midges in the mornings and BWO's in the early afternoon.
5x or 6x tippet
Best Patterns
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Haslam's Midge Adult #22
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Midge Cluster #18-20
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Parachute Adams #18-22
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Parachute Ant #16-22 black
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Triple Double #14-18 purple, black
Streamers
While not as consistent as nymph fishing, streamer patterns can be successful, especially in the shadows of early morning or late afternoon. Try olive or black patterns, mimicking sculpin or smaller baitfish.
As a general rule: Dark day, dark fly. Bright day, bright fly.
Retrieval speed - slow.
0-2x tippet
Best Patterns
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El Sculpito tan
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Cheech Leech - articulated all colors
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Complex Twist Bugger - all colors
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Galloup's Dungeon - articulated all colors
Nymphs
Double nymph rigs with a BWO emerger and a midge dropper are proving effective. Try using tungsten beadhead patterns for your point fly to get your rig down to feeding fish quickly There are a large variety of nymphs for the fish to choose from. Attractor patterns in the mornings help get your small midge offerings noticed. Focus on the middle and tail-outs of runs at about 9 feet deep. The fish will move into shallower water when the BWO's start popping
Use 5x or 6x tippet
Best Patterns
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Grey Soft Hackle #22
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Pheasant Tail #18 -22
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Scuds #20-22 orange, grey, olive
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Black Beauty #20-24
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Yong Special #24
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